Bryan has 800 stickers.
Adam has 400 stickers.
Adam receives some stickers from Bryan.
Now, Bryan has 200 more stickers than Adam.
- How many stickers does Bryan have in the end?
- How many stickers does Adam have in the end?
- How many stickers does Bryan give to Adam?
|
Bryan |
Adam |
Total |
Before |
800 |
400 |
1200 |
Change |
- ? |
+ ? |
|
After |
1 u + 200 |
1 u |
2 u + 200 |
(a)
At first
Number of stickers that Bryan has = 800
Number of stickers that Adam has = 400
Total number of stickers = 800 + 400 = 1200
In the end
Number of stickers that Bryan has = 1 u + 200
Number of stickers that Adam has = 1 u
Total number of stickers
= 1 u + 1 u + 200
= 2 u + 200
The total number of stickers at first and in the end remains unchanged.
Total number of stickers in the end = Total number of stickers at first
2 u + 200 = 1200
2 u = 1200 - 200 = 1000
1 u = 1000 ÷ 2 = 500
Number of stickers that Bryan in the end
= 1 u + 200
= 500 + 200
= 700
(b)
Number of stickers that Adam has in the end
= 1 u
= 500
(c)
Number of stickers that Bryan gives to Adam
= 500 - 400
= 100
Answer(s): (a) 700; (b) 500; (c) 100