Lynn and Tina used the same number of berries to bake cakes. Lynn used
47 of her berries and Tina used
38 of her berries. They had a total of 159 berries at first.
- How many berries did each girl use?
- How many berries did both girls have left altogether?
| |
Lynn |
Tina |
Total |
Before |
7x3 =
21 u |
8x4 =
32 u |
53 u |
Change |
- 4x3 =
- 12 u |
- 3x4 =
- 12 u |
|
After |
3x3 =
9 u |
5x4 =
20 u |
29 u |
(a)
Lynn and Tina used the same number of berries to bake cakes. Make the numerators the same. LCM of 4 and 3 is 12.
4x37x3 of Mary's berries =
3x48x4 of Tina's berries
1221 of Mary's berries =
1232 of Tina's berries
Total number of berries at first
= 21 u + 32 u
= 53 u
53 u = 159
1 u = 159 ÷ 53 = 3
Number of berries that each girl used
= 12 u
= 12 x 3
= 36
(b)
Total number of berries that both girls had left
= 9 u + 20 u
= 29 u
= 29 x 3
= 87
Answer(s): (a) 36; (b) 87
