Opal and her brother have some marbles. Opal had 56 more marbles than her brother. After Opal gave her brother 37 marbles, her brother has 79 marbles now.
- How many marbles did her brother have at first?
- How many marbles does Opal have now?
|
Opal |
Her brother |
Before |
1 u + 56 |
1 u |
Change |
- 37 |
+ 37 |
After |
? |
79 |
(a)
Number of marbles that her brother had at first
= 79 -37
= 42
(b)
Number of marbles that Opal had at first
= 1 u + 56
= 42 + 56
= 98
Number of marbles that Opal has now
= 98 - 37
= 61
Answer(s): (a) 42; (b) 61