PR1ME WEEK 2 I DAY 3
Lesson 2 Problem Solving
Learn Word problems Evan has z guppies and 21 angelfish. He has 38 fishes altogether. How many of his fishes are guppies ?
Understand the problem. 1
There are 38 fishes altogether. 21 of the fishes are angelfish. The rest are guppies. I have to find the unknown z , which is the number of guppies.
Plan what to do. 2
I can form an equation in terms of z to solve the problem.
Answer . 3
Work out the
z + 21 = 38 z + 21 – 21 = 38 – 21 z = 17
I can show this using a bar model.
z
21
Evan has 17 guppies.
38
is correct. 4
Check if your answer
When z = 17 ,
z + 21 = 17 + 21 = 38 ✓
My answer is correct.
1. Understand
2. Plan
3. Answer
4. Check
14
50 Scholar Zone Summer: Math
ISBN 978-981-09-0495-1
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