Charlie has 800 stickers and Adam has 3 times as many stickers as Charlie.
- How many stickers must Adam give to Charlie so that they have equal number of stickers?
- How many stickers will each boy have in the end?
| |
Charlie |
Adam |
Total |
| Before |
1 u |
3 u |
4 u |
| Change |
+ 1 u |
- 1 u |
|
| After |
2 u |
2 u |
4 u |
(a)
At first
Number of stickers that Charlie has = 1 u = 800
Number of stickers that Adam has = 3 u
Total number of stickers
= 1 u + 3 u
= 4 u
To have equal number of stickers,
the stickers must be equally divided into 2 groups.
In the end
Number of stickers that each boy has
= 4 u ÷ 2
= 2 u
Number of stickers that Adam must give to Charlie
= 3 u - 2 u
= 1 u
= 1 x 800
= 800
(b)
Number of stickers that each boy will have in the end
= 2 u
= 2 x 800
= 1600
Answer(s): (a) 800; (b) 1600
