2b. k = 75
2b. k = 75
900 × 3
x 3
900 × 3
x 3 1 � 3 =
1 � 3 =
Where Math Gets Real
3a.
x 12 x = 2,700 2,700 3 =
3a.
x = 2,700 2,700 3 = 2,700 × 4
then unlikely
ANSWERS
en unlikely
25,000
x 12
25,000
20,000 Answer Key (cont.) SCHOLASTIC MATH SEPTEMBER 25, 2017 (PAGE 3) 20,000 3 � 4 = Where Math Gets Real
2,700 × 4 x 12 x = 10,800 spots
3 � 4 = x 12 x = 10,800 spots
sible possible
Exit Slips A. 1. 7.5 cm �
continued from page 2
9 FASCINATING FOSSILS SKILLS SHEETS Metric Prefixes Conversion order may vary. Please accept all reasonable equations. 1. 65 m � 100 cm 1 m = 6,500 cm 2. 800,000 mm � 1 m 1,000 mm = 800 m 3. 40 km � 1,000 m 1 km = 40,000 m 40,000 m � 100 cm 1 m = 4,000,000 cm/hr 4. 11.8 kg � 1,000 g 1 kg = 11,800 g 11,800 g � 1 Mg 1,000,000 g = 0.0118 Mg Dinosaur Dimensions Conversion order may vary. Please accept all reasonable equations. 1. 3,720 cm � 0.3937 in. 1 cm � 1,464.56 in. 1,464.56 in. 12 in. � 122.05 feet 2. 9,200 km � 0.6214 mi. 1 km � 5,716.88 mi 3. 96 in. � 1 cm 0.3937 in. � 243.84 cm 243.84 cm � 10 mm 1 cm � 2,438.40 mm 4. 1.52 m � 3.2808 ft 1 m � 4.99 ft 4.99 ft � 12 in. 1 ft � 59.88 in. 240 in. 59.88 in. � 4.01 � 4 sixth-graders 5. 37.2 m � 3.2808 ft 1 m � 122.05 ft 216 in. 12 in. = 18 ft 122.05 ft – 18 ft = 104.05 ft 9 Exit Slips Answers will vary. Accept all reasonable answers based on the graph. A. 1. It appears that the graph is showing the cost of popcorn over the years and that the larger the size of popcorn, the more expensive it is. Also, the units are not labeled on the y -axis. B. 1. See bar graph, below right
15,000 2. Total: 450 animals Artiodactyla: 80 450 = 15,000
Page 66: Drawing a Circle Graph FAKE NEWS, FAKE DATA SKILLS SHEETS Drawing a Circle Graph 1. Total: 4,660 students 932 + 3,029 + 699 = 4,660 Urban: 932 4,660 = x 360 = 932 × 360 4,660 = 72° Suburban: 3,029 4,660 = x 360 = 3,029 × 360 4,660 = 234° Rural: 699 4,660 = x 360 = 699 × 360 4,660 = 54° 10 mm 1 cm = 75 mm
Suburban 234° Urban 72° PROBLEM OF THE DAY 1. 2, 3, 5 2. 28 + 7 = 5 w 35 = 5 w w = 7 3. 3.45 � 2.2 = 7.59 pounds 4. 6 13 = x 39 13x = 234 x = 18 5. C, right triangle 6. 9.96 � 10 7 7. = (equal sign); 9 � 4 = 108 3 8. 2.2 5 = 0.44 0.44 � 100 = 44% 9. |4 – 7| 3 = |-3| 3 = 1 10. 3:30 = 1:10 11. $75,000,000 � 26.4 = $1,980,000,000 12. 3.14 � (3.7) 2 � 6 = 257.92 ≈ 258 in. 3 13. 2.4 mi � 1 hr 30 mi = .08 hr .08 hr � 60 min 1 hr = 4.8 mins. 14. 3:39 = 1:13 scholastic.com/math answers continued on page 3 FAKE NEWS, FAKE DATA SKILLS SHEETS Drawing a Circle Graph 1. Total: 4,660 students 932 + 3,029 + 699 = 4,660 Urban: 932 4,660 = x 360 = 932 × 360 4,660 = 72° Suburban: 3,029 4,660 = x 360 = 3,029 × 360 4,660 = 234° Rural: 699 4,660 = x 360 = 699 × 360 4,660 = 54° 2. 7.5 cm � 0.3937 in. 1 cm � 2.95 in. B. 1. 280 mm 10 mm = 28 cm 28 cm � 0.3937 in. 1 cm � 11.02 in. It is less than 1 foot by 0.98 in. (12 – 11.02 = 0.98) Rural 54° Suburban 234° Rural 54° Urban 72°
4. Answers will vary. Sample answer may include: Fake news stories might intentionally use misleading graphs to make data reflect what the writers want readers to believe based on the spin of the article or news outlet. 5,000 10,000 5,000 10,000 Where Math Gets Real Carnivora: x 360 = 80 × 360 450 = 64° 39 450 = x 360 = 39 × 360 450 = 31.2° Chiroptera: 84 450 = 24 450 = x 360 = x 360 = 84 × 360 450 24 × 360 450 = 67.2° Marsupiala: = 19.2° Monotremata: 45 450 = x 360 = 45 × 360 450 = 36° Primate: = 60.8°
than the 3 was most so few ter than the 013 was most use so few
76 450 =
x 360 =
76 × 360 450
102 450 =
x 360 =
102 × 360 450
*with white behind logo = 81.6°
Where Math Gets Real Rodentia:
Page 64: Deceptive Data Answers will vary. Accept all reasonable answers based on the graph. 1. Possible answers include: The graph is upside down, the origin (0,0) is at the top of the y -axis instead of the bottom left corner, and the x -axis is labeled at the top of the graph instead of the bottom. It is also missing a title. 2. It appears that the huge increases in hours spent watching TV are huge decreases. The data is difficult to read, and it confuses the viewer. 3. The argument could be that people spend less time watching TV in the summer months. 4. Possible answers include: Invert the y -axis so that it will start at (0,0) and increases from the bottom left corner, place the x -axis on the bottom, and add a title. 5. 3. The argument could be that people spend less time watching TV in the summer months. 4. Possible answers include: Invert the y -axis so that it will start at (0,0) and increases from the bottom left corner, place the x -axis on the bottom, and add a title. 5. Number of Giraffes 3 6 0 3b. k = 2,600 Proportions in the Wild 1. 2 15 = 100,000 x 2 × 50,000 15 � 50,000 = 100,000 x x = 750,000 zebras 2. 4 1 = 20,000 x 4 × 5,000 1 � 5,000 = 20,000 x Monotremata 36° Marsupiala 19.2° Chiroptera 67.2° Deceptive Data Answers will vary. Accept all reasonable answers based on the graph. 1. Possible answers include: The graph is upside down, the origin (0,0) is at the top of the y -axis instead of the bottom left corner, the x -axis is labeled at the top of the graph instead of the bottom. It is also missing a title. 2. It appears that the huge increases in hours spent watching TV are huge decreases. The data is difficult to read and it confuses the viewer. 250 200 Proportions in the Wild 1. 2 15 = 100,000 x 2 × 50,000 15 � 50,000 = 100,000 x x = 750,000 zebras 2. 4 1 = 20,000 x 4 × 5,000 1 � 5,000 = 20,000 x 150 100 50 0 Number of Giraffes 3 6 0 3b. k = 2,600 Artiodactyla 64° Primate 60.8° Rodentia 81.6° Carnivora 31.2°
nes s ar because ricanes anes o year because tches the occurred matches the hat occurred
Where Math Gets Real
SCHOLA SEPTEMBE
Where Math Gets Real
continued from page 2
Exit Slips Answers will var answers based o A. 1. It appears that cost of popcorn the larger the siz expensive it is. A on the y -axis. B. 1. See bar graph FASCINATING F Metric Prefixes Conversion orde reasonable equa 1. 65 m � 100 cm 1 m 2. 800,000 mm 3. 40 km � 1,00 1 k 40,000 m � 100 1 4. 11.8 kg � 1,000 1 k 11,800 g � 1 M 1,000 Dinosaur Dimen Conversion orde reasonable equa 1. 3,720 cm � 0 1,464.56 in. 12 in. � 1 2. 9,200 km � 0
x 360 = scholastic.com/math answers continued on page 3 80 × 360 450 = 64°
2. Total: 450 animals Artiodactyla: 80 450 =
x 360 = 15. 24° + 53° = 77° 180° – 77° = 103° 16. 3 � 4 = 12 17. A, line graph 18. 2.5 hr � $15
s
39 450 =
39 × 360 450
Where Math Gets Real Carnivora:
= 31.2°
84 450 = 24 450 =
1 hr = $37.50 per week
84 × 360 450 24 × 360 450
x 360 = x 360 = 12 15 =
Chiroptera:
= 67.2°
19. 27 15 20. 12:(14 � 12) = 12:168 or 1:14 15 15 +
Marsupiala:
= 19.2°
45 450 =
x 360 =
45 × 360 450
Monotremata:
= 36°
76 450 =
x 360 =
76 × 360 450
Primate:
= 60.8°
TIME TEENS SPEND WATCHING TV
50 100 150 200 250
102 450 =
x 360 =
102 × 360 450
Where Math Gets Real Rodentia:
*with white behind logo = 81.6°
COST OF MOVIE TICKETS BY DECADE
$0 $2 $4 $6 $8 $10
Artiodactyla 64°
Rodentia 81.6°
0
Carnivora 31.2° 2007
1987
1997
2017
Primate 60.8°
YEAR
MONTH
SEPTEMBER 25, 2017 • Answers
scholastic.com/math
Chiroptera 67.2°
Monotremata 36°
Marsupiala 19.2°
Deceptive Data Answers will vary. Accept all reasonable answers based on the graph. 1. Possible answers include: The graph is upside down, the origin (0,0) is at the top of the y -axis instead of the bottom left corner,
100 50 0
56
Made with FlippingBook - Online catalogs