Cathy and her brother have some buttons. Cathy had 72 more buttons than her brother. After Cathy gave her brother 10 buttons, her brother has 86 buttons now.
- How many buttons did her brother have at first?
- How many buttons does Cathy have now?
|
Cathy |
Her brother |
Before |
1 u + 72 |
1 u |
Change |
- 10 |
+ 10 |
After |
? |
86 |
(a)
Number of buttons that her brother had at first
= 86 -10
= 76
(b)
Number of buttons that Cathy had at first
= 1 u + 72
= 76 + 72
= 148
Number of buttons that Cathy has now
= 148 - 10
= 138
Answer(s): (a) 76; (b) 138