PR1ME I Whole Class WEEK 2 I DAY 4
Learn A baker bought 5 cartons of eggs. Each carton had y eggs. He used 12 eggs to make some sponge cakes and had 18 eggs left. How many eggs were there in each carton at first ?
5 y – 12 = 18 5 y – 12 + 12 = 18 + 12 5 y = 30 5 y ÷ 5 = 30 ÷ 5 y = 6
y y y y y
5 y
There were 6 eggs in each carton at first.
12 used 18 left
1. Understand
2. Plan
3. Answer
4. Check
Learn
Kristin bought a roll of red ribbon x meters long. She used 1 3 of the red ribbon and 8 meters of blue ribbon to decorate a stage. She used 11 meters of ribbon altogether. How long was the roll of red ribbon at first ?
1 3
x + 8 = 11
First, I need to form an equation in terms of x .
1 3 x + 8 – 8 = 11 – 8
1 3
x = 3
1 3
x × 3 = 3 × 3 x = 9
The roll of red ribbon was 9 meters long at first.
1. Understand
2. Plan
3. Answer
4. Check
Student Handbook, page 56
15
60 Scholar Zone Summer: Math
ISBN 978-981-09-0495-1
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