Irene and Gabby used the same number of blueberries to bake cakes. Irene used
27 of her blueberries and Gabby used
35 of her blueberries. They had a total of 310 blueberries at first.
- How many blueberries did each girl use?
- How many blueberries did both girls have left altogether?
| |
Irene |
Gabby |
Total |
Before |
7x3 =
21 u |
5x2 =
10 u |
31 u |
Change |
- 2x3 =
- 6 u |
- 3x2 =
- 6 u |
|
After |
5x3 =
15 u |
2x2 =
4 u |
19 u |
(a)
Irene and Gabby used the same number of blueberries to bake cakes. Make the numerators the same. LCM of 2 and 3 is 6.
2x37x3 of Mary's blueberries =
3x25x2 of Gabby's blueberries
621 of Mary's blueberries =
610 of Gabby's blueberries
Total number of blueberries at first
= 21 u + 10 u
= 31 u
31 u = 310
1 u = 310 ÷ 31 = 10
Number of blueberries that each girl used
= 6 u
= 6 x 10
= 60
(b)
Total number of blueberries that both girls had left
= 15 u + 4 u
= 19 u
= 19 x 10
= 190
Answer(s): (a) 60; (b) 190
