There are 30 stickers in Box W and 10 stickers in Box X.
Some stickers are transferred from Box W to Box X.
Box W has 10 more stickers than Box X.
How many stickers are transferred from Box W to Box X?
|
Box W |
Box X |
Before |
30 |
10 |
Change |
- ? |
+ ? |
After |
1 u + 10 |
1 u |
Total number of stickers
= 30 + 10
= 40
Total number of stickers in the end = 1 u + 10 + 1 u = 2 u + 10
The total number of stickers at first and in the end remains unchanged.
2 u + 10 = 40
2 u = 40 - 10 = 30
1 u = 30 ÷ 2 = 15
Number of stickers that are transferred from Box W to Box X
= Number of stickers in Box X in the end - Number of stickers in Box X at first
= 15 - 10
= 5
Answer(s): 5