Victoria and Hilda used the same number of chocolate chips to bake cakes. Victoria used
45 of her chocolate chips and Hilda used
37 of her chocolate chips. They had a total of 129 chocolate chips at first.
- How many chocolate chips did each girl use?
- How many chocolate chips did both girls have left altogether?
|
Victoria |
Hilda |
Total |
Before |
5x3 = 15 u |
7x4 = 28 u |
43 u |
Change |
- 4x3 = - 12 u |
- 3x4 = - 12 u |
|
After |
1x3 = 3 u |
4x4 = 16 u |
19 u |
(a)
Victoria and Hilda used the same number of chocolate chips to bake cakes. Make the numerators the same. LCM of 4 and 3 is 12.
4x35x3 of Mary's chocolate chips =
3x47x4 of Hilda's chocolate chips
1215 of Mary's chocolate chips =
1228 of Hilda's chocolate chips
Total number of chocolate chips at first
= 15 u + 28 u
= 43 u
43 u = 129
1 u = 129 ÷ 43 = 3
Number of chocolate chips that each girl used
= 12 u
= 12 x 3
= 36
(b)
Total number of chocolate chips that both girls had left
= 3 u + 16 u
= 19 u
= 19 x 3
= 57
Answer(s): (a) 36; (b) 57