Min and her sister have some pens. Min had 46 more pens than her sister. After Min gave her sister 15 pens, her sister has 90 pens now.
- How many pens did her sister have at first?
- How many pens does Min have now?
|
Min |
Her sister |
Before |
1 u + 46 |
1 u |
Change |
- 15 |
+ 15 |
After |
? |
90 |
(a)
Number of pens that her sister had at first
= 90 -15
= 75
(b)
Number of pens that Min had at first
= 1 u + 46
= 75 + 46
= 121
Number of pens that Min has now
= 121 - 15
= 106
Answer(s): (a) 75; (b) 106