There are 90 stickers in Box E and 20 stickers in Box F.
Some stickers are transferred from Box E to Box F.
Box E has 20 more stickers than Box F.
How many stickers are transferred from Box E to Box F?
|
Box E |
Box F |
Before |
90 |
20 |
Change |
- ? |
+ ? |
After |
1 u + 20 |
1 u |
Total number of stickers
= 90 + 20
= 110
Total number of stickers in the end = 1 u + 20 + 1 u = 2 u + 20
The total number of stickers at first and in the end remains unchanged.
2 u + 20 = 110
2 u = 110 - 20 = 90
1 u = 90 ÷ 2 = 45
Number of stickers that are transferred from Box E to Box F
= Number of stickers in Box F in the end - Number of stickers in Box F at first
= 45 - 20
= 25
Answer(s): 25