Math Gr 5, Vol 2 Teacher Resources and Answer Key

MATH Teacher Resources and Answer Key GRADE 5

Teacher Resources and Answer Key Grade 5 2 MATH SCHOLASTIC INC. Scholar Zone Extended Learning gratefully acknowledges content provided by Scholastic Magazines+.

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Welcome to Scholar Zone Extended Learning!

This guide is designed to introduce you to the materials and practices you’ll be using with scholars in Scholar Zone Extended Learning for Math. These materials are for use during time allocated for math instruction and practice within a comprehensive extended learning schedule. You’ll find a Planning and Pacing section that shows what is included in each of the Math Sessions. This will help you prepare ahead for your time with scholars. You’ll also find an Answer Key to help you check scholars’ work. What’s in the Student Books Student Content The student book has articles from Scholastic's DynaMath magazine and Scholastic's SuperScience magazine, as well as practice pages and motivating Extra! activities. A focus on informational text helps students build knowledge and vocabulary as they develop and practice math skills. Teacher Notes Each session’s notes for the teacher below the student pages provide suggestions for presenting instruction and assigning student work, as well as discussion questions you can use to engage students with the texts provided. These suggestions are for guidance only; you may want to adapt them according to your students’ needs and extended learning logistics. Suggested Materials If possible, gather the following materials to help make students' drawing and writing activities engaging and successful: • Colored pens and pencils for writing and drawing • Math manipulatives, such as rulers, fraction tiles, connecting cubes, and/or others

Welcome to Scholar Zone Extended Learning! (continued)

Overview of Session Types: Grade 5, Volume 2 Math Time

Each of Scholastic's DynaMath articles introduces an engaging topic that provides a real-world context for math work. Most DynaMath problem sets include a What to Do section that models how to complete the exercises. Aligned Practice: Do the Math! pages following Scholastic's DynaMath articles reinforce the skills covered in the DynaMath problem sets. Additional Practice: Do the Math! pages reinforce other grade-level skills in varied formats. These activities are designed to engage students in connecting with the magazine article content through various means, including creative expression through writing and drawing, peer interaction, and more. Scholastic's SuperScience articles give students opportunities to branch out further into STEM topics for a few sessions to build science knowledge and skills.

Do the Math!

Extra! Activities

Science Time

Explore More

Practice pages guide students to build skills or apply ideas from Scholastic's SuperScience articles.

Map Time

Students take a brief break from math to build map knowledge and skills.

Just for Fun

Open-ended Just for Fun pages at the back of the book provide opportunities for early finishers or students looking for diverting activities to create, write, and draw. These optional activities can be done at any time, just for fun.

Supporting Students With Math Work

As students engage in math work, ask them to explain their thinking. Provide coaching as needed for areas that challenge students, referring to any supports on the pages. Help students strategically think through problems rather than just giving answers. Consult the Answer Key provided, if you need to find correct answers. Coaching Strategies If a student accurately solves problems or completes tasks, say: • Wow! You’re working hard today. • You’re on the right track. • How did you figure that out? • Can you show the work you did to figure out this problem? If a student appears to be stuck or challenged, try these: • If the page provides examples or visual supports, see if you can show the student how to apply them to problems he or she needs help with. • Let’s see how you can use the information here to help with this. • Let’s go through this step by step. First, we need to .... What do we do next? • Show your work. Then we can see if there is anything you should fix. • Let’s solve it together. Begin by showing how you get started, thinking aloud about the steps you are taking. Ask: What should we do next? • Remember, there’s no such thing as a “math person.” You can learn from your mistakes and move forward! If the student comes up with incorrect responses, say: • Take another look at this one. See if you can find your error. I’ll help if needed. • This one is not correct. Let’s work together to correct it.

Planning and Pacing

Each session may be accomplished in one day. If a session takes longer, just complete it the next day. Pacing is flexible, and you may adapt it to meet your needs. When adapting instruction, we recommend that you prioritize focus on Math Time selections. For Math Time work, help your students understand the What to Do or other model/ example section before asking them to complete the practice on their own or with additional support. The sessions follow a skills sequence informed by a typical sequence for each grade. However, you might choose to reorder sessions based on the needs of your students. Sessions Overview: Grade 5, Volume 2

1 S

2 S

3 S

4 S

Math Time: Beetle Battle, pp. 4–5

Math Time: Beetle Battle, continued, pp. 6–7 Build Knowledge: Meet the people going to war against forest-killing beetles Learn and Practice: Comparing and ordering decimals

Do the Math!, pp. 8–9

Do the Math!, pp. 10–11

Build Knowledge: Meet the people going to war against forest-killing beetles

Aligned Practice: Using number lines to compare decimals and fractions

Aligned Practice: Comparing decimals Additional Practice: Using decimals to solve word problems

5 S

6 S

7 S

8 S

Math Time: Moving a 3,500-pound T. rex, pp. 12–13

Math Time: Moving a 3,500-pound T. rex, continued, pp. 14–15

Do the Math!, p. 16 Extra!, p. 17

Do the Math!, pp. 18–19

Build Knowledge: A makeover for the world’s most complete T. rex

Aligned Practice: Completing fraction models and writing the equivalent fractions they represent Extend: Using information from an article to develop ideas

Aligned Practice: Adding fractions with unlike denominators Additional Practice: Adding fractions to solve word problems

Learn and Practice: Adding fractions with unlike denominators using area models, number lines, and equivalent fractions

Planning and Pacing (continued)

9 S

10 S

11 S

12 S

Science Time: Shooting for the Stars, pp. 20–21

Science Time: Shooting for the Stars, continued, pp. 22–23 Build Knowledge: This teen is gearing up to blast off to Mars. Will you join her?

Explore More, pp. 24–25

Do the Math!, pp. 26–27

Build Knowledge: This teen is gearing up to blast off to Mars. Will you join her?

Extend: Using critical thinking to answer questions about a science article; analyzing a bar graph

Additional Practice: Using number sense, whole-number operations, and algebraic/logical reasoning to solve a problem; checking receipts for accuracy by adding and subtracting numbers with decimals

13 S

14 S

15 S

16 S

Math Time: Planet Protector, pp. 28–29

Do the Math!, p. 30 Extra!, p. 31

Do the Math!, pp. 32–33

Do the Math!, pp. 34–35

Build Knowledge: Catharine Conley keeps Earth and other planets safe from alien invaders Learn and Practice: Using arrays to divide and solve problems with remainders

Aligned Practice: Using disks and grids to represent and solve division problems with remainders Extend: Developing a narrative with descriptive details

Additional Practice: Adding and subtracting fractions; multiplying 2- and 3-digit numbers to solve a customized word problem

Additional Practice: Solving multiplication problems with 3-digit numbers; solving a multistep problem using operations with fractions, measurement (weight), and algebraic thinking

Planning and Pacing (continued)

17 S

18 S

19 S

20 S

Math Time: The Coldest Concert, pp. 36–37 Build Knowledge: At a festival in Norway, artists play instruments made of ice!

Math Time: The Coldest Concert, continued, pp. 38–39 Build Knowledge: At a festival in Norway, artists play instruments made of ice! Learn and Practice: Drawing fractional models to subtract mixed numbers without regrouping

Do the Math!, p. 40 Extra!, p. 41

Do the Math!, pp. 42–43

Aligned Practice: Using given models to subtract mixed numbers with unlike

Additional Practice: Subtracting like fractions; using fractions and money computation to solve a multistep problem

denominators Extend: Using details from an

informational article to develop plans and expectations

21 S

22 S

23 S

24 S

Math Time: Social Media Mountaineers, pp. 44–45 Build Knowledge: Two determined climbers share what it’s like to trek up the world’s tallest mountain—twice

Math Time: Social Media Mountaineers, continued, pp. 46–47 Build Knowledge: Two determined climbers share what it’s like to trek up the world’s tallest mountain—twice Learn and Practice: Adding mixed numbers on a number line by finding the common denominators to calculate the total

Do the Math!, p. 48 Extra!, p. 49

Do the Math!, pp. 50–51

Aligned Practice: Drawing number bonds to convert improper fractions to mixed numbers Extend: Adding mixed numbers to solve problems

Additional Practice: Practicing adding and subtracting fractions; setting up equations to solve word problems

Planning and Pacing (continued)

25 S

26 S

27 S

28 S

Science Time Earth Rocks!, continued, pp. 54–55 Build Knowledge: Check out five extraordinary rock formations

Science Time: Earth Rocks!, pp. 52–53

Explore More, p. 56 Extra!, p. 57

Do the Math!, pp. 58–59

Build Knowledge: Check out five extraordinary rock formations

Extend: Using a map, map key, and compass rose to answer questions about rock formations in the U.S. Extend: Identifying and summarizing key details from a science article

Additional Practice: Using different forms of measurement to solve word problems; finding item costs by calculating using percentages

29 S

30 S

31 S

32 S

Math Time: 4-Legged Superstars, pp. 60–61 Build Knowledge: Cute pets take social media by storm

Math Time: 4-Legged Superstars, continued, pp. 62–63 Build Knowledge: Cute pets take social media by storm Learn and Practice: Using tape diagrams to multiply a fraction by a whole number

Do the Math!, p. 64 Extra!, p. 65

Do the Math!, pp. 66–67

Aligned Practice: Using number lines to multiply fractions by whole numbers Extend: Creating a social media post inspired by an informational text

Additional Practice: Multiplying fractions to solve a word problem; multiplying fractions to solve a customized word problem

Just for Fun, pp. 68–78

NG CANDY

1 thousand 1 hundred 9 tens

1 thousand 1 hundred 5 tens

5. 31,000 Answer Key

1 thousand 1 hundred

31 thousands

30 thousands 5 hundreds 8 tens 1 one 30 thousands 5 hundreds

Session 2 Page 7: Math Time: Beetle Battle 30 thousands PAGES 8-11: BEETLE BATTLE 1a. 0.3 1b. Southern pine beetles are longer than mountain pine beetles. 0 6 10 4 10 2 10 5 10 3 10 1 10 1c. 4 10 > 3 10 or 3 10 < 4 10 2a. Ones . Tenths Hundredths Thousandths 0 . 1 9 0 0 . 2 0 1 0 . 2 0 0 2b. The beetle that measures 0.201 is the largest. 0.201 > 0.2 3a. 0.5 0.6 0.7 0.8 0.9 1.0 3b. The beetles that measure 0.75 cm and 0.85 cm could be ladybugs. ladybug range 3,000 3,500 3,499.99 3,499.99

BONUS: Answers will vary. Accept any fraction less than or equal to 36 100 or any decimal less than or equal to 0.36 BONUS: Answers will vary. Accept any fraction less than or equal to 36 100 or any decimal less than or equal to 0.36 Page 10: A Weighty Decision <, >, <, <; >, =, >, =; =, >, >, >; >, <, <, <; >, <, <, >; <, >, <, >; <; NEITHER! THEY’RE BOTH EQUALLY 3.575 POUNDS! Page 11: Duet LEVELING UP: DECIMAL DERBY 1. 14.15 2. 0.33 78 100 − 45 100 = 33 100 = 0.33 3. 0.67 4a. 29.65 4b. 29.7 5. 0.7 6a. $3.74 $2.99 + $0.75 = $3.74 6b. $4.00 7. 0.57 LEVELING UP: DECIMAL DERBY 1. 14.15 2. 0.33 78 100 − 45 100 = 33 100 = 0.33 3. 0.67 4a. 29.65 4b. 29.7 5. 0.7 6a. $3.74 $2.99 + $0.75 = $3.74 6b. $4.00 7. 0.57 BONUS: The decimal points were not lined up properly. The correct amount earned was $12.64. Correct: 10.75 + 1.89 12.64 1 1 Incorrect: 10.75 + 1.89 29.65 1 BONUS: The decimal points were not lined up properly. The correct amount earned was $12.64. Correct: 10.75 + 1.89 12.64 1 1 Incorrect: 10.75 + 1.89 29.65 1 1C. Equivalent fractions may vary. Possible answers: 1 × 2 3 × 2 = 1. 2.3 feet 2. 3.5 feet 3. 0.5 foot 4. 2.8 feet 5. 5.6 feet high Super Challenge: Ed’s boots should be 7.8 feet tall. Fred’s boots should be 5.5 feet tall. Jed’s boots should be 13.4 feet tall. Session 6 Page 15: Math Time: Moving a 3,500-pound T-Rex 3A. 83 ÷ 5 = 16 frames R3 3B. Answers may vary. Please accept all reasonable equations. Possible answer: 80 ÷ 5 = 16 4. 249 ÷ 5 = 49 seconds R4 5. 360 ÷ 14 = 25 seconds R10 PAGES 8-11: MOVING A 3,500-POUND T. REX Models may vary. Please accept all reasonable models. 1A. 0 or 1 1 3 2 3 3 3 1B. Models will vary. Possible answers: 2 6 1 × 3 3 × 3 = 3 9 1 × 4 3 × 4 = 4 12

29 30

BONUS: I disagree because 3,499.99 is less than the midpoint between 3,000 and 4,000. Therefore, 3,499.99 rounds down to 3,000. BONUS: I disagree because 3,499.99 is less than the midpoint between 3,000 and 4,000. Therefore, 3,499.99 rounds down to 3,000.

on the number line

370

4,000

365

400

nd B have different lace I was asked to

For “Beetle Battle” Lesson Plan 3 DYNADASH GRADE 5: ROUNDING DECIMALS TO TENTHS AND HUNDREDTHS 3,000 3,500 4,000 For “Beetle Battle” Lesson Plan 3 DYNADASH GRADE 5: ROUNDING DECIMALS TO TENTHS AND HUNDREDTHS

800

1. 0.3 2. 1.4 3. 0.2 4. 1.6 5. 0.3 6. 2.5 7. 3.1 8. 2.6 9. 7.1 10. 4.6 1. 0.3 2. 1.4 3. 0.2 4. 1.6 5. 0.3 6. 2.5 7. 3.1 8. 2.6 9. 7.1 10. 4.6

1.0 11. 6.07 12. 4.89 13. 5.83 14. 8.44 15. 9.02 16. 10.48 17. 11.43 18. 16.81 19. 21.87 20. 24.00 11. 6.07 12. 4.89 13. 5.83 14. 8.44 15. 9.02 16. 10.48 17. 11.43 18. 16.81 19. 21.87 20. 24.00

MPKIN RACE

han 700 lbs.

Student Edition PAGES 2-3: NUMBERS IN THE NEWS Garbage Gobbler: 10 hundreds 100, 200, 300, 400, 500, 600, 700, 800, 900, 1,000 Shorter Sleep: 6 days + 6 days = 12 more days Inclusive Theme Park: No, one person in the group will not have a buddy. PAGES 4-5: NUTS FOR ORGANIZATION 1A.

no buddy Teacher’s Edition PAGE T12: PROBLEM OF THE DAY 1. 170 2. 77 minutes 3. 20 4. $0.68 5. Closer to 500 when rounding to the nearest hundred. 600

0.85 0.8 0.9

0.75

0.5 0.6

0.7

4a. Beetle B, Beetle C, Beetle D, Beetle A 4b. Beetle A

5 10 PAGES 12-13: TRICK OR TREAT? 1. D 2. B 3. D 4. A 5. C 6. B 7. 43% 8. It is trending upward. 9. A circle graph is a good choice because the data is showing various parts of a whole. 10. $82.90 0 0.1 PAGES 14-15: LAVA LAB 1. Answers will vary, though students should use their timing data in their answers. 2a. Felix 0.3 3 10 0.7 7 10 0.6 6 10 0.4 4 10 0.8 8 10 2b. Jenni, by 0.1 miles or 1 2. Answers will vary, though students should use equations and math vocabulary to compare their results. 10 of a mile 3. 0.03 or 2b. Jenni, by 0.1 miles or 1 3. Answers will vary, but students should make the connection that liquids with higher viscosity have a slower flow. 0.5 5 10 5 10 0.5 0.2 2 10 2 10 0.2 0 10 7 10 0.7 4 10 0.4 6 10 0.6 1 10 8 10 0.8 3 10 0.3 3 100 0 10 1 10 2a. Felix 0 0.1 5 10 0 10 7 10 2 10 4 10 6 10 1 10 3 10 10 of a mile 5. Specimens A and D could not be adult beetles because they measure more than the maximum length of 11 cm.

Session 3 Page 8: Number Line Comparisons LEVELING DOWN: NUMBER LINE COMPARISONS 1. 0.8 or 8 10 0 0.1 0.5 0.3 0.7 0.9 0.2 0.6 0.4 0.8 1.0 LEVELING DOWN: NUMBER LINE COMPARISONS 1. 0.8 or 8 10 0 0.1 0.5 0.3 0.7 0.9 0.2 0.6 0.4 0.8 1.0 0 10 7 10 2 10 9 10 4 10 6 10 1 10 8 10 3 10 10 10

1B. 8 × 2 = 16 or 2 × 8 = 16 2A.

1 8

2B. 3 × 4 = 12 or 4 × 3 = 12 3A. Arrays may vary. Possible arrays:

2A. Right leg =

550

4 8

1 2

Left leg =

536

1 8

4 8

5 8

2B.

500

4 8

0.9 9 10 9 10 0.9

1.0 10 10

6. 8, 6 7. 0.60 > 0.06 because: Ones

1 8

2 8

3 8

4 8

5 8

6 8

7 8

3A. 20 3B. 2 × 4

. Tenths Hundredths

10 10

1 × 5 4 × 5 =

8 20

5 20

. .

0 0

6 0

0 6

5 × 4 =

1.0

0.09 squirrels, 28 (10 female + 18 male = 28 total squirrels). Arrays can be arranged as 7 × 4 or 4 × 7, 2 × 14 or 14 × 2, and 1 × 28 or 28 × 1. PAGES 6-7: BRINGING WRECK-IT RALPH TO LIFE Partial quotients may vary. Please accept all reasonable solving methods. 1A. C, 47 ÷ 5 1B. 47 ÷ 5 = 9 sequences R2 1C. C, 45 ÷ 5 2. 33 ÷ 4 = 8 blinks R1 0.08 0.1 10 100 0.1 8 100 0.08 9 100 0.09 9 10 3B. Equations may vary. Accept equations that represent multiplication or repeated addition. Possible answers: 6 × 4 = 24; 3 × 8 = 24; 2 × 12 = 24. 4. 2 × 16 nuts = 32 total nuts 5. The student is incorrect because you can make up to 6 different arrays to show the total number of 8 10 10 10 8. 7; 7 × 7 = 49 9. 4 pumpkins (4 × 4 = 16) 10. Ones . 10 100 8 100 9 100 Tenths Hundredths 9 . . . 5 5 5 7 5 6 10 9 11. 5:30 12. 15 25 or 3 5 13. 300 pounds

8 20

5 20

13 20

3C.

Hips & Tail

Legs

Total

13 20

9 × 2 22 × 2

18 44

4A.

0 0.01

0.02

0.03

0.04

0.05

0.06

0.07

3 100

4 × 4 11 × 4

16 44

3. 0.03 or

4B.

0 100 PAGE 16: UNBELIEVABLE BATS : Bug-Eating Machine: 1,200 3 100 0.03 6 100 0.06 1 100 4 100 0.04 2 100 0.02 5 100 0.05 0 0.01

7 100 0.07

4C. 34 44 PAGES 12-13: ARE KIDS PLAYING FEWER 18 44 + 16 44 =

4. False, 0.07 = 7 100 5a. Pine tree 5b. By 0.02 or 2 0 100 3 100 1 100 2 100 4. False, 0.07 = 7 100 5a. Pine tree 5b. By 0.02 or 2 100 inches Biggest and Smallest Bats: 10 + 7 and 100 + 70; Yes, the second number is 10 times greater than each part of the first number. (10 × 10) (7 × 10). +0.02 Page 9: Number Line Comparisons Sick Bats: five million five hundred thousand City Bats: 7 hundred thousands 5 ten thousands; 1 million 5 hundred thousands 6 100 4 100 7 100 5 100

SPORTS? 1. A, 2008

2. 2016; Yes, because the article states that fewer kids are playing sports each year so you would expect 2016 to have the fewest kids. Session 7 Page 16: Equivalent Fraction Models

14. square; rhombus. They’re similar in that they have four equal sides. The square has four right angles. The rhombus has two opposite and equal acute angles and two opposite and equal obtuse angles. 15. 3,900 beats each hour 16. Because obtuse angles are greater than 90° and 90° plus any number that is greater than 0 is going to be greater than 90°. 17. 1 2 3 18. $0.15

100 inches

1 NOVEMBER 2018 І DYNAMATH ONLINE ANSWER KEY

continued on next page

+0.02

0.01

0.04

0.06

0.10

6 OCTOBER 2017 І DYNAMATH ONLINE ANSWER KEY 0.01 0.06 0.04

0.10

6 OCTOBER 2017 І DYNAMATH ONLINE ANSWER KEY

2 OCTOBER 2017 І DYNAMATH ONLINE ANSWER KEY

Answer Key (continued)

4. c 5. A nswers may include leadership and communication skills. Taylor is helping to support other students pursuing STEM fields. She’s also studying Mandarin Chinese and Spanish to improve her communication skills. Page 25: Record-Breaking Astronauts

1. Peggy Whitson 2. about 150 days 3. False 4. about 340 days Session 12 Page 26: Party Animals Suggested Solution: The party had one

8-legged animal, six 4-legged ones, and five 2-legged ones. Start with the total number of feet counted (42), and use number sense and trial-and- error to test different combinations until you land on the one that works. Page 27: Welcome to the Eat ‘Em & Add ‘Em Diner guest check 1: $7.15 guest check 2: $6.90 guest check 3: $11.20 Session 13 Page 29: Math Time: Planet Protector 1. 1 week, 3 days 2. 1 year, 6 months 3. 4 R8; You would need 5 trays, and the last tray would have 2 empty slots. 4. 9 R17 5. 18 months, R13 days

Session 8 Page 18: Why Did the Moon Skip Dessert? It was full. A-7/8, I-7/9, F-5/6, W-3/4, R-11/15, C-9/10, T-8/12, S-7/12, U-7/10, L-13/15 Page 19: Fraction Jumps 1. 19/24 of a yard 2. 5/6 of a yard Session 11 Page 24: Think It Through 1. a 2. Taylor struggled in school and was also teased, but she became more confident as she explored STEM. She also didn’t have the money for Space Camp, so she raised it herself. 3. NASA will need to figure out how to transport

supplies to Mars, how to convert urine to drinking water, and how to grow food in space.

2. A, fish 3. B, 80 4. B, 500 5. False 6. C, The animal species are likely to endangered soon. 7. Unknown status 8. Yes, because 1 10 + 1 10 = 2 10 . 9. The number of endangered inverteb much greater than the other groups PAGES 14-15: RECIPES FOR SU

Session 14 Page 30: Using Disks to Model Remainders is a far cry from 40 million. But bison were close to becoming extinct when there were less than 1,000 left. So the fact that there are 400,000 now is a success in our view. 5c. The central herd increased by 1,922 bison from 1985 to 2005. 6. Answers will vary. For us, it depends on the definition of success. Yes, the current population of today (400,000) 2. 12 ÷ 4 = 3 3. 28 ÷ 7 = 4 4. 4 times 24

30 36 40 72

3 3 3 3

Answer Key (continued)

6 6 6 6

7. 149,760 8. 103,958 Page 35: Fish Scales 5. 24 ÷ 4 = 6 PAGES 6-7: HOT WHEELS 1A. Tens Ones . Tenths Hundredths 3 5 . 4 4 3 6 . 3 2 1B. 35.44 seconds 2. Gabriel was faster.

MEASURING TOOL

TABLESPOONS (ESTIMATE)

TABLESPOONS (ACTUAL)

My Container Answers will vary.

Answers will vary.

USING DISKS TO MODEL REMAINDERS 1. Number of groups: 3 Number of items in each group: 5 1b. 3 × 5 = 15 1c. dividend = 5; 15 ÷ 3 = 5 2. 19 ÷ 3 = 6 R1

1 4

cup

Answers will vary.

Tens Ones .

Tenths

Hundredths

Suggested Solution: Uncle Sid’s biggest catch weighs 15 pounds. Half a pound more than 4 ½ pounds is 5 pounds, and 5 is 1/3 of 15. Session 18 Page 39: Math Time: The Coldest Concert 2 0 . 7 3 2 3 . 5 3 Gabriel Other Athlete 3. 15.14, 15.22, 15.36, 15.62 Answers will vary. Possible answers: They all finished the race in under 16 seconds; They all have 1 2 cup 3 4 cup 1 cup

Answers will vary.

eal raisin 24 = $120; 9 in profit lude a at will reap

Answers will vary.

the same value in the tens and ones places. 4. The athletes from England and Germany tied for second place. 99.89 < 100.82 < 101.79; 100.82 = 100.82 PAGES 8-11: THE COLDEST CONCERT 1A. ONLINE ANSWER KEY

1. Answers will vary. Please accept a answers based on the size of the c used. 2. Answers will vary; Yes, the chart in 4 tablespoons per each additional PAGE 16: NUTCRACKER NUMB Answers will vary. Please accept all rea observations, questions, and word pro

3. 4 R3

1B.

Student Edition PAGES 2-3: NUMBERS IN THE NEWS Post-It Pizza: No, they are halves because the whole is split into two pieces. Ice Watch: 74 − 56 = 18 years old MythBusters For Kids: Answers will vary. Possible answers: 10 10 10

1 2 5 6

1 2

1C. 6

− 3 = 3

feet

4 6

1 6

2. 3

− 1

= 2

feet

OVEMBER 2016 • Answer Key • Page 2 of 3 4. 45 ÷ 4 = 11 R1 5. Answers will vary. One example: 7 R4

1 DECEMBER 2018/JANUARY 2019 І DYNAMATH ONLINE ANSWER KEY

continu

4 24

3 24

1 24

3. 1

−

= 1

feet

6 10

5 10

1 10

4. 2

− 1

= 1

feet more

7 8

14 8

6 8

5. 4

+ 4

= 8

= 9

7 8

6 8

1 8

– 9

= 1

feet left over

1 6 3 5 5 PAGES 4-5: HUNGRY HOLIDAYS 1. 12 2 3 5

Session 19 Page 40: Subtracting Mixed Numbers With Models For “The Coldest Concert” — Lesson Plan 3 LEVEL DOWN: SUBTRACTING MIXED NUMBERS WITH MODELS PAGES 12-13: ANIMALS UP CLOSE 1. D, invertebrates

2 4 1 2. A, fish 3. B, 80 4. B, 500 5. False 6. C, The animal species are likely to become endangered soon. 7. Unknown status 8. Yes, because 1 10 + 1 10 = 2 10 . 9. The number of endangered invertebrate species is much greater than the other groups of species. PAGES 14-15: RECIPES FOR SUCCESS?

3 3 3 3

2. 12 ÷ 4 = 3 3. 28 ÷ 7 = 4 4. 4 times 24

Session 15 Page 32: Doctor Knows Best 1. 2/3 of the cocoa was left. 2. He drank 2/3 of the mug. MULTIPLYING WITH PARTIAL PRODUCTS 1a. 10 8 50 10 × 50 = 500 8 × 50 = 400 6 10 × 6 8 × 6 6 6 6 6

2 6

= 48 5. 24 ÷ 4 = 6 PAGES 6-7: HOT WHEELS 1A. Tens Ones . Tenths Hundredths 3 5 . 4 4 3 6 . 3 2 1B. 35.44 seconds 2. Gabriel was faster.

= 60

11 2b. 14 hundreds + 21 tens + 14 tens + 21 ones 2c. 1 thousand 7 hundreds 7 tens 1 ones 3a. 40 2 80 40 × 80 = 3,200 2 × 80 = 160 4 40 × 4 = 160 2 × 4 = 8 3b. 3,528 4a. 3 tens × 6 tens = 18 hundreds (student calculated 18 ones) 4b. 18 hundreds + 6 tens + 54 tens + 18 ones = 2 thousands 4 hundreds 1 ten 8 ones 4c. 2,418 5. Answers will vary. Please accept all reasonable answers. 3. 1/2 of the mug was filled with cocoa. 4. 1/3 of the tea was left in the mug. 5. You need to add 1/3 of a full glass. Super Challenge: You can add 6 ladles. 1/4 of a cup will be left over. Session 16 Page 34: Name That Product! 1b. 500 + 60 + 400 + 48 = 1,008 2a. 7 tens 7 ones 2 tens 7 tens × 2 tens = 14 hundreds 7 ones × 2 tens = 14 tens 3 ones 7 tens × 3 ones = 21 tens 7 ones × 3 ones = 21 ones Tens Ones . Tenths Hundredths 2 0 . 7 3 2 3 . 5 3 Gabriel Other Athlete 3. 15.14, 15.22, 15.36, 15.62 Answers will vary. Possible answers: They all finished the race in under 16 seconds; They all have 1. 63,646 2. 30,603 3. 22,500 4. 194,790 5. 37,522 6. 27,686 the same value in the tens and ones places. 4. The athletes from England and Germany tied for second place. 99.89 < 100.82 < 101.79; 100.82 = 100.82 PAGES 8-11: THE COLDEST CONCERT 1A. 1B. 1 DECEMBER 2018/JANUARY 2019 І DYNAMATH ONLINE ANSWER KEY

MEASURING TOOL

TABLESPOONS (ESTIMATE)

TABLESPOONS (ACTUAL)

My Container Answers will vary.

Answers will vary.

5 12 1

3 12 1

1 4 1 2 3 4

cup

Answers will vary.

cup

Answers will vary.

cup

Answers will vary.

1 cup

Answers will vary.

10 DECEMBER 2018/JANUARY 2019 І DYNAMATH ONLINE ANSWER KEY PAGE 16: NUTCRACKER NUMBERS Answers will vary. Please accept all reasonable observations, questions, and word problems. 1. Answers will vary. Please accept all reasonable answers based on the size of the container(s) used. 2. Answers will vary; Yes, the chart increased by 4 tablespoons per each additional 1 4 cup.

B . 1 2 15 Models will vary. Please accept all reasonable models. Possible answer:

continued on next page

than 3 5

and the sum should be larger than its two

Answer Key (continued) Record-Setting Slumber: 21 days more 367 − 346 21 days Life Saving Fan: $7,820 per month $7,820 6 46,920 −42 49 −48 12 −12 00

addends.

2b. 9 10

; 3 5

+ 3

= ? → 3 5

= 6

→ 6 10

+ 3

= 9

1 10

0 1 10

2 10

3 10

4 10

5 10

6 10

7 10

8 10

9 10

10 10

13 10 or 1

3 10

km; 1 2

+ 4

+ 2 5

= ?; 1 2

= 5

; 2 5

= 4

3a.

;

13 10

4 10

5 10

+ 4

Session 20 Page 42: Magnetic Math 1. 1/3; 2. 3/8 3. 3/11; 4. 14/20 5. 1/32; 6. 20/67 7. 59/83; 8. 22/121; 9. 3/156; 10. 99/312 What did one magnet say to the other magnet? “You attract me.” Page 43: Turkey Talk Suggested Solution: The error was subtracting $3 from $15 rather than finding 1/3 of $15 ($5) and subtracting it. Silvio’s price should be $15 – $5 = $10. Session 22 Pages 46–47: Math Time: Social Media Mountaineers PAGES 4-5: GIANTS OF GENEROSITY Holiday Hearts: It takes 36 hours to program 1 song. Supportive School: Each class would get 12 red noses. 60 ÷ 5 = 12; Mowing That Matters: She earned 4 T-shirts; 40 ÷ 10 = 4; Hero for the Homeless: 10 people sat at each table; 100 ÷ 10 = 10 PAGES 6-7: 5 SURPRISES FROM SATURN 1. A Moon’s Mysterious Ocean 2. Mountain-size Rings: No, it is not correct. The correct T-chart is: 3. Lurking Alien Life? 4. Planet-wide Storm: The numbers are all factors of 8. 5. Hidden Moons: 21 1 21 3 7 8 1 8 2 4 22 1 22 2 11 6 1 6 2 3

Session 23 Page 48: Converting Improper Fractions to Mixed Numbers LEVELING DOWN: CONVERTING IMPROPER FRACTIONS TO MIXED NUMBERS Area models will vary. Please accept all reasonable models. 10 = or 1 17 20 km; 13 10 + 55 100 = ?; 13 10 = 130 100 ; + 55 100 = 185 100 ; 185 100 = 1 85 100 + 2 1 4 = ?; 2 3 = 8 12 ; 1 4 = 3 12 ;

3b. 1 85 100

LEVELING UP: MIXED N PROBLEMS 1a. 8 7 12 miles; 3 3 12 + 5 4 12 = 8 1b. 13 1 12 miles; 8 7 12 + 4 6 12 = 12 2a. 21 6 8 or 21 3 4 pounds; 10 7 8 2b. 43 4 8 or 43 1 2 pounds; 21 6 8 3a. 4 11 12 miles; 1 3 12 + 3 8 12 = 4 1 1 3b. 14 9 12 or 14 3 4 miles; 4 11 12 + 4 4a. 3 8 feet taller; 4 5 8 − 4 2 8 = 4b. 1 1 24 feet taller; 5 16 24 − 4 15 24 4c. 1 5 12 feet taller; 5 8 12 − 4 3 12 BONUS: Answers will vary. Pl reasonable story problems.

130 100

4. 6 11 12

minutes long; 4 2 3

1. 3 3 4 = 6 11 12 5. The 2 full tanks weigh more than the 2 empty tanks. Empty: 2 1 5 + 2 1 5 = 4 2 5 kg Full: 3 9 10 + 3 9 10 = 6 18 10 = 7 4 5 kg 7 4 5 kg > 4 2 5 kg PAGES 12-13: HOLIDAY TRAVEL STATS ; 4 4 + 4 4 + 4 4 + 3 4 = 1 + 1 + 1 + 3 4 2. 2 2 3 ; 3 3 + 3 3 + 2 3 = 1 + 1 + 2 3 = 2 2 3 3. 1 4 6 or 1 2 3 ; 6 6 + 4 6 = 1 + 4 6 = 1 4 6 4 + 2 + 8 12 + 3 12

= 3 3 4

1. C 2. A

4. 4 2 5 3. A 4. C

5. D 6. B

7. True

; 5 5

+ 5 5

+ 2 5

= 1 + 1 + 1 + 1 + 2 5

= 4 2 5

5. 2 5 8 8. The circle graph titled “U.S. Travelers During the Winter Holiday Season, 2016-2107”; 6% 9. $190 difference; $350 − $160 = $190 10. Other (3%) ; 8 8 + 8 8 + 5 8 = 1 + 1 + 5 8 = 2 5 8 1 + 1 2 PAGES 14-15: A REAL-LIFE TRANSFORMER? 1. Gravity plays a part in the experiment in many ways. Possible answer: Gravity is a constant therefore it keeps the stack of books, board, and 6. 6 1 2 ; 2 2 + 2 2 + 2 2 + 2 2 + 2 2 + 2 2 + 1 2 = 6 1 2

62 1 62 2 31

= 1 + 1 + 1 + 1 + 1 +

PAGES 8-11: SOCIAL MEDIA MOUNTAINEERS 1a. 0 1 3 2 3 3 3

1b.

7. 4 2 4

or 4 1 2

; 4 4

+ 4 4

+ 2 4

= 1 + 1 + 1 + 1 + 2 4

1 3

2 3

3 3

1 3 + ? = 1c. 1 8 24 1d. It took Richards 8 hours to climb 550 meters. I know this because 1 3 of a day (24 hours) is 8 hours. 2a. Answers will vary. Possible answer: 3 7 is the incorrect sum because 3 7 is a smaller fraction than 3 5 and the sum should be larger than its two addends. 2b. 9 10 ; 3 5 + 3 10 = ? → 3 5 = 6 10 → 6 10 + 3 10 = 9 10 3 = 1 × 8 3 × 8 = answer Key 1 DECEMBER 2017 / JANUARY 2018 І DYNAMATH ONLINE ANSWER KEY 2 3 → 1 3 + 1 3 = 2 3

= 4 2 4

8. 2 6 7

; 7 7

+ 7 7

+ 6 7

= 1 + 1 + 6 7

= 2 6 7

THE NEWS

BONUS: Answers will vary. Please accept all reasonable number bonds.

Page 49: Mixed Numbers–Made Simple

Practice Page 81: The elevator was full. S-4 1 ⁄ 2 , F-3 3 ⁄ 5 , H-10 1 ⁄ Perimeter and Area Review Name 82

Practice Page 74: 1. 4 17 ⁄ 24 2. 6 2 ⁄ 15 3. 10 25 ⁄ 66 4. 11 1 ⁄ 5 5. 10 6. 5 7 ⁄ 8 7. 3 7 ⁄ 60 4. 6 11 ⁄ 21 9. 12 11 ⁄ 30 10. 14 34 ⁄ 45 Practice Page 75: Subtracting Mixed Numbers Name 75

Practice Page 66: Cape Wrangell R. 11 ⁄ 15

Date

2 , W-1 Geome-tricks! 3 ⁄

1 ⁄

4 , L-2

3 , R-

W. 1

2 ⁄

A-2 1 ⁄

3 ⁄

2 ⁄

2 , E-10, U-6

7 , V-6

3 , T-9

1 10 M. 1 1 ⁄ 1 10

9 ⁄

1 10

Use some math magic to solve three perimeter and area problems in a row and get Tic-Tac-Math!

A. 1 2 ⁄

C. 1 G. 1 N. 1 E. 1

1 ⁄

9 10 5

Practice Page 82:

0 1 10

2 10

3 10

4 10

5 10

6 10

7 10

8 10 T. 1 ⁄

10 10

1 ⁄ 1 ⁄

P. 1 3 ⁄

= ?; 1 2 8

13 10 or 1

3 10

km; 1 2

+ 4

+ 2 5

= 5 10

; 2 5

= 4

Find the perim trapezoid with 2 4 ___ 5 inches, bo of 5 3 ___ 5 inches, of 7 3 ___ 5 inches a Write your ans simplest form.

The length of one side of a regular pentagon is 12.5 cm. What is its perimeter?

A rectangle’s length is 12.4 cm and its width is 4.9 cm. What is its area?

3a.

;

L. 1 5 ⁄

7 ⁄

13 10

4 10

5 10

+ 4

62.5 cm 60.76 cm 20

Date

= ?; 13 10 Practice Page 67: It was full. A- 7 ⁄ 8 , I- 7 ⁄ 9 , F- 5 ⁄ 6 , W- 3 ⁄ = 130 100 ;

Fraction Leftovers

3b. 1 85 100

or 1 17 20

km; 13 10

+ 55 100

NEROSITY

What’s left over when you subtract these mixed numbers? Solve three problems in a row to get Tic-Tac-Math! Write all answers in simplest form.

130 100

+ 55 100

= 185 100

; 185 100

= 1 85 100 U- 7 ⁄ + 2 1 4

11 ⁄

9 ⁄

8 ⁄

7 ⁄

4 , R-

15 , C-

10 , T-

12 , S-

12 ,

Find the perimeter of a rectangle with length of 9 3 ___ 4 inches and width of 3 3 ___ 5 inches. Write your answer in simplest form. 26 7 10 "

A triangle’s height is 12 inches. Its area is 21 inches. What is the length of its base?

The perimeter octagon is 22 _ is the length o

= 8 13 ⁄

10 , L-

= ?; 2 3 15 Practice Page 68: 1. 1 13 ⁄ 24 miles 2. 1 49 ⁄ 60 miles Practice Page 69: Nicolaus Copernicus L. 1 ⁄ 6 G. 1 ⁄ 9 B. 1 ⁄ 2 T. 1 ⁄ 12 O. 5 ⁄ 6 S. 3 ⁄ 20 U. 3 ⁄ 8 C. 1 ⁄ 3 E. 7 ⁄ 16 R. 13 ⁄ 24 A. 1 ⁄ 4 I. 3 ⁄ 4 P. 1 ⁄ 10 N. 5 ⁄ 9 J. 2 ⁄ 3 Practice Page 70: a blaze-r A- 3 ⁄ 8 , B- 5 ⁄ 9 , O- 2 ⁄ 5 , T- 1 ⁄ 14 , R- 1 ⁄ 12 ; 1 4 = 3 12 ; 5. D 6. B 7. True

4. 6 11 12

minutes long; 4 2 3

uld get 12 red noses. : She earned 4 Homeless: 10 people

5 Session 24 Page 50: At the Movies 1. 10 4 5 minutes 2. 2 5 6 minutes 3. 5 1 2 minutes 4. 1 13 8 minutes 7 ___ 10 – 1 3 ___ 5 = 10 7 ___ 8 – 5 3 ___ 4 = 9 3 ___ 5 – 3 1 ___ 3 = 6 9 ___ 10 – 3 4 ___ 5 = 3 1 7 4 ___ 5 – 3 2 ___ 5 = 8 3 ___ 4 – 2 1 ___ 2 = 6 1 4 4 2 5 10 6 4 15 5 5 1 8 1 10

5 6

3.5 "

4 + 2 + 8 12 = 6 11 12 5. The 2 full tanks weigh more than the 2 empty tanks. Empty: 2 1 5 + 2 1 5 = 4 2 5 kg Full: 3 9 10 + 3 9 10 = 6 18 10 = 7 4 5 kg 7 4 5 kg > 4 2 5 kg PAGES 12-13: HOLIDAY TRAVEL STATS + 3 12

5 DECEMBER 2017 / JANUARY 2018 І DYNAMATH ONLINE ANSWER KEY

5 7 ___

1 ___ 16 =

8 – 1

13 16

Find the perim with side lengt 12 2 ___ 3 inches, a Write your ans form. 23

The area of a square is 25 square inches. What amount would be 1 ___ 4 of the area? What amount would be 3 ___ 2 of the square’s area? 6 1 4 sq. in.; 2 sq. in. 37 1

The length of a side of a regular hexagon is 32.5 cm. What is its perimeter?

FROM SATURN

6 1 6 2 3

195 cm

not correct.

6 5 ___

5 ___ 24 =

12 – 5

5 24

Practice Page 83: 1. 1 foot, 10 inches 2. 2 feet, 4 inches 3. 21 inches 4. 15 feet 5. 2 yards, 2 feet 6. 3 yards, 1 foot 7. 144 inches 8. 2 yards, 28 inches 9. 1 yard, 24 inches 10. 540 inches

1. C 2. A

3. A 4. C

8. The circle graph titled “U.S. Travelers During the Winter Holiday Season, 2016-2107”; 6% 9. $190 difference; $350 − $160 = $190 10. Other (3%) PAGES 14-15: A REAL-LIFE TRANSFORMER? 1. Gravity plays a part in the experiment in many ways. Possible answer: Gravity is a constant therefore it keeps the stack of books, board, and D- 1 ⁄ 5 , E- 2 ⁄

8 1 8 2 4

17 2 ___

6 ___ 15 = 4 15

3 – 14

Practice Page 76: to a doc-k C-4 1 ⁄ 6 , D-3 1 ⁄ 5 , T-1 1 ⁄

MOUNTAINEERS

1 ⁄

7 ⁄

3 ⁄

3 , L-

2 , Z-

10 , N-

5 ,

5 ⁄

1 ⁄

2 , A-8 2 , E-2

8 , K-2

3 , B-10

3 ,

3 Practice Page 71: 72

S-6 1 ⁄

4 ⁄

1 ⁄

7 ⁄

7 , O-5

7 , P-9

6 4

4 5

4 16

5. 57 1 2 minutes Super Challenge: 23 60 miles Practice Page 69: Nicolaus Copernicus L. 1 ⁄ 6 G. 1 ⁄ 9 B. 1 ⁄ 2 T. 1 ⁄ 12 O. 5 ⁄ 6 S. 3 ⁄ 20 U. 3 ⁄ 8 C. 1 ⁄ 3 E. 7 ⁄ 16 R. 13 ⁄ 24 A. 1 ⁄ 4 I. 3 ⁄ 4 P. 1 ⁄ 10 N. 5 ⁄ 9 J. 2 ⁄ 3 Practice Page 70: a blaze-r A- 3 ⁄ 8 , B- 5 ⁄ 9 , O- 2 ⁄ 5 , T- 1 ⁄ 14 , R- 1 ⁄ Page 51: Nature Patterns 1. 6, 21; 2. 12, 44; 3. 51, 88; 4. 24 Session 27 Page 56: Rock Country 1. sedimentary 2. d 3. Answers will vary. 4. Igneous rocks are mainly found in the 3 4 minutes 2. 1 49 ⁄ 3 , L- 1 ⁄ D- 1 ⁄ 5 , E- 2 ⁄

The len regula What is

Answer Key (continued)

9 ___ 10 – 3

4 ___ 5 = 3 1

3 ___ 5 – 3

1 ___

6 5 ___

5 ___ 24 =

3 =

12 – 5

4 15

5 24

Prac 1. 1 2. 2 3. 21 4. 15 5. 2 6. 3 7. 14 10. 5 Prac 1. 33 2. 12 3. 16 4. 16 5. 8; 6. Th be is Prac 1. 20 2. 77 3. 39 4. 37 5. 95 Prac 1. sc 2. 15 3. sn 4. 12 5. 1 ∕ 5 8. 2 9. 1 sh sq

Session 31 Page 64: Multiplying Fractions by Whole Numbers With Number Lines For “4-Legged Superstars” — Lesson Plan 3 LEVEL DOWN: MULTIPLYING FRACTIONS BY WHOLE NUMBERS WITH NUMBER LINES 17 2 ___ 3 – 14 5 7 ___ 10 – 1 3 ___ 5 = 10 7 ___ 8 – 5 3 ___ 4 = 5 1 8 5 1 10 3

6 ___ 15 = 4 15

6 10 Practice Page 76: to a doc-k C-4 1 ⁄ 6 , D-3 1 ⁄ 5 , T-1 1 ⁄ or 3 5

7 ⁄

3 ⁄

2 , Z-

10 , N-

5 ,

5 ⁄

1 ⁄

2 , A-8 2 , E-2

8 , K-2

3 , B-10

3 ,

northwestern, western, and southwestern U.S. 5. Igneous rocks form from the cooling of volcanic lava. These rocks are found throughout the western U.S., indicating that volcanoes are found there. Session 28 Page 58: Measurement With Fun Facts –128°F 79 415 2 lb, 3 oz, or 35 oz 3 Practice Page 71: 1. 19 ⁄ 24 of a yard 2. 5 ⁄ 6 of a yard Practice Page 72: 3 5 2 3 10 3 1 4 3 1 8 7 2 4 3 2 8 3 Which mixed number is greater? Write > or < in the box. Solve three problems in a row to get Tic-Tac-Math! Comparing Mixed Numbers Name Date 72 Greater Than or Less Than? > < >

or 7 , O-5 2 3 2 4 6

2 S-6 1 ⁄

4 ⁄

1 ⁄

7 ⁄

7 , P-9

1 3 Practice Page 77: London Underground 1. G R E, 1 1 ⁄ 4 2. N O D, 8 1 ⁄ 3 3. N O L, 2 1 ⁄ 8 4. A P, 1 3 ⁄ 8 5. O R, 3 5 ⁄ 6 6. D N U, Tom, 1 ⁄ 8 mile 3 or 1 2 1 6 12 1 1 3 3 2 7 2 0 Practice Page 78: It hugs the shore. G- 1 ⁄ 2 , I-16, H- 3 ⁄ 8 , S- 2 ⁄ 3 5 1 bags of dog food Session 32 Page 66: Monster Hailstone E- 5 ⁄ 12 , R- 4 ⁄ 11 FEBRUARY 2019 І DYNAMATH ONLINE ANSWER KEY

2 7

3 5

continued on next page 1 ⁄ 6 , O-1, U-6, T- 1 ⁄ 5 ,

9 , A-

Page 59: What a Sale! 1a. $7.20; b. $16.80 2a. $6.80; b. $10.20 3a. $3.30; b. $18.70 4a. $13.00; b. $52.00 Session 30 Page 63: Math Time: 4-Legged Superstars 3A. 4,050 sq. cm = 90 cm × l 4,050 sq. cm ÷ 90 cm = 45 cm l = 45 cm 3B. 90 cm 90 cm 90 cm × 90 cm = 8,100 square centimeters 4. w = 10 m – 2 m = 8 m l = 36 m – 4m = 32 m l = 32 m w = 8 m 2 2 1 2 8 5 3 3 2 3 9 5 4 5 3 3 6 3 1 8 2 1 16 6 2 3 1 2 4 1 > < < < > >

3 2

7 Practice Page 79: Coffeyville, Kansas Y. 1 ⁄ 10

t Edition ERS IN THE NEWS m – 40 cm = 28 cm on is longer by 28 centimeters.

I. 2

40 cm

10 5

68 cm

A. 3 ⁄ O. 2 ⁄

F. R. S. V. K. L.

3 ⁄

1 ⁄

et; number lines will vary.

32 m × 8 m = 256 square meters PAGES 8-11: 4-LEGGED SUPERSTARS 1A. B, 72 × 1 6 1B. 72 Practice Page 73: at a flea market E-5 3 ⁄ 4 , R-7 3 ⁄ 5 , A-4 2 ⁄ 12 12 12 12 12 12 1C. 12 treats that week 2. 33

M. 9

E. 1 ⁄

+ 200

+ 90

490 500

N. 1 ⁄

3 ⁄

0 0 + 90 = 290 feet 300

400

C BOOK KID

U. 2 ⁄ C. 7 ⁄

3 ⁄

4 ⁄

7 ⁄

5 ⁄

6 ⁄

3 , T-8

10 , F-6

6 , M-4

7 ,

W. 5 ⁄

9 ⁄

11 N-9 8 ⁄

11 7 ⁄

13 ⁄

4 ⁄

11 9 , O-3

20 , K-2

14 , L-9

Practice Page 80: Answers will vary. Check students’ work.

Sprout was not frowning in 11 photos. 33 × 1 3 = 33 3 = 11

3A. She was dressed up 9 times. 15 × 1 5 = 15 5 = 3 15

1 3

9 3

3B. 9 ×

= 3 photos

igger. BALL FIGHT!

3 20

720 20

4A. 240 ×

= 36 comments

1 2

36 2

4B. 36 ×

= 18 comments

square meters

quare meters

110

100 Math Pract

continued on next page

ONLINE ANSWER KEY

Notes

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