Joelle and Anna had an equal number of erasers at first. Joelle used
15 of her erasers and Anna used
16 of her erasers. They used 88 erasers altogether. How many erasers did Anna have in the end?
|
Joelle |
Anna |
Before |
5x6 = 30 u |
6x5 = 30 u |
Change |
- 1x6 = - 6 u |
- 1x5 = - 5 u |
After |
4x6 = 24 u |
5x5 = 25 u |
The number of erasers that Joelle and Anna each had at first is the same. Make the number of erasers that Joelle and Anna each had at first the same. LCM of 5 and 6 is 30.
Number of erasers that Joelle and Anna used
= 6 u + 5 u
= 11 u
11 u = 88
1 u = 88 ÷ 11 = 8
Number of erasers that Anna had in the end
= 25 u
= 25 x 8
= 200
Answer(s): 200