Joelle and Diana had an equal number of buttons at first. After Joelle gave 7 buttons to Diana, Diana had 20 buttons. How many buttons does Joelle have in the end?
| |
Joelle |
Diana |
| Before |
1 u |
1 u |
| Change |
- 7 |
+ 7 |
| After |
1 u - 7 |
20 |
Number of buttons that Diana had at first
= 20 - 7
= 13
1 u = 13
Number of buttons that Joelle had at first = 13
Number of buttons that Joelle had in the end
= 1 u - 7
= 13 - 7
= 6
Answer(s): 6
