Risa and Yen used the same number of berries to bake cakes. Risa used
25 of her berries and Yen used
34 of her berries. They had a total of 207 berries at first.
- How many berries did each girl use?
- How many berries did both girls have left altogether?
|
Risa |
Yen |
Total |
Before |
5x3 = 15 u |
4x2 = 8 u |
23 u |
Change |
- 2x3 = - 6 u |
- 3x2 = - 6 u |
|
After |
3x3 = 9 u |
1x2 = 2 u |
11 u |
(a)
Risa and Yen used the same number of berries to bake cakes. Make the numerators the same. LCM of 2 and 3 is 6.
2x35x3 of Mary's berries =
3x24x2 of Yen's berries
615 of Mary's berries =
68 of Yen's berries
Total number of berries at first
= 15 u + 8 u
= 23 u
23 u = 207
1 u = 207 ÷ 23 = 9
Number of berries that each girl used
= 6 u
= 6 x 9
= 54
(b)
Total number of berries that both girls had left
= 9 u + 2 u
= 11 u
= 11 x 9
= 99
Answer(s): (a) 54; (b) 99