Sabrina and Mary had an equal number of pens at first. After Sabrina gave 10 pens to Mary, Mary had 25 pens. How many pens does Sabrina have in the end?
| |
Sabrina |
Mary |
| Before |
1 u |
1 u |
| Change |
- 10 |
+ 10 |
| After |
1 u - 10 |
25 |
Number of pens that Mary had at first
= 25 - 10
= 15
1 u = 15
Number of pens that Sabrina had at first = 15
Number of pens that Sabrina had in the end
= 1 u - 10
= 15 - 10
= 5
Answer(s): 5
