There are 100 stickers in Box K and 20 stickers in Box L.
Some stickers are transferred from Box K to Box L.
Box K has 20 more stickers than Box L.
How many stickers are transferred from Box K to Box L?
|
Box K |
Box L |
Before |
100 |
20 |
Change |
- ? |
+ ? |
After |
1 u + 20 |
1 u |
Total number of stickers
= 100 + 20
= 120
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 = 120
2 u = 120 - 20 = 100
1 u = 100 ÷ 2 = 50
Number of stickers that are transferred from Box K to Box L
= Number of stickers in Box L in the end - Number of stickers in Box L at first
= 50 - 20
= 30
Answer(s): 30