There are 90 stickers in Box T and 50 stickers in Box U.
Some stickers are transferred from Box T to Box U.
Box T has 30 more stickers than Box U.
How many stickers are transferred from Box T to Box U?
|
Box T |
Box U |
Before |
90 |
50 |
Change |
- ? |
+ ? |
After |
1 u + 30 |
1 u |
Total number of stickers
= 90 + 50
= 140
Total number of stickers in the end = 1 u + 30 + 1 u = 2 u + 30
The total number of stickers at first and in the end remains unchanged.
2 u + 30 = 140
2 u = 140 - 30 = 110
1 u = 110 ÷ 2 = 55
Number of stickers that are transferred from Box T to Box U
= Number of stickers in Box U in the end - Number of stickers in Box U at first
= 55 - 50
= 5
Answer(s): 5