Anna and Penelope had an equal number of erasers at first. After Anna gave 4 erasers to Penelope, Penelope had 25 erasers. How many erasers does Anna have in the end?
|
Anna |
Penelope |
Before |
1 u |
1 u |
Change |
- 4 |
+ 4 |
After |
1 u - 4 |
25 |
Number of erasers that Penelope had at first
= 25 - 4
= 21
1 u = 21
Number of erasers that Anna had at first = 21
Number of erasers that Anna had in the end
= 1 u - 4
= 21 - 4
= 17
Answer(s): 17