Risa and Jade had an equal number of erasers at first. After Risa gave 9 erasers to Jade, Jade had 20 erasers. How many erasers does Risa have in the end?
|
Risa |
Jade |
Before |
1 u |
1 u |
Change |
- 9 |
+ 9 |
After |
1 u - 9 |
20 |
Number of erasers that Jade had at first
= 20 - 9
= 11
1 u = 11
Number of erasers that Risa had at first = 11
Number of erasers that Risa had in the end
= 1 u - 9
= 11 - 9
= 2
Answer(s): 2