There are 90 stickers in Box J and 15 stickers in Box K.
Some stickers are transferred from Box J to Box K.
Box J has 15 more stickers than Box K.
How many stickers are transferred from Box J to Box K?
|
Box J |
Box K |
Before |
90 |
15 |
Change |
- ? |
+ ? |
After |
1 u + 15 |
1 u |
Total number of stickers
= 90 + 15
= 105
Total number of stickers in the end = 1 u + 15 + 1 u = 2 u + 15
The total number of stickers at first and in the end remains unchanged.
2 u + 15 = 105
2 u = 105 - 15 = 90
1 u = 90 ÷ 2 = 45
Number of stickers that are transferred from Box J to Box K
= Number of stickers in Box K in the end - Number of stickers in Box K at first
= 45 - 15
= 30
Answer(s): 30