Bryan has 800 stickers.
Adam has 400 stickers.
Adam receives some stickers from Bryan.
Now, Bryan has 300 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 + 300 |
1 u |
2 u + 300 |
(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 + 300
Number of stickers that Adam has = 1 u
Total number of stickers
= 1 u + 1 u + 300
= 2 u + 300
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 + 300 = 1200
2 u = 1200 - 300 = 900
1 u = 900 ÷ 2 = 450
Number of stickers that Bryan in the end
= 1 u + 300
= 450 + 300
= 750
(b)
Number of stickers that Adam has in the end
= 1 u
= 450
(c)
Number of stickers that Bryan gives to Adam
= 450 - 400
= 50
Answer(s): (a) 750; (b) 450; (c) 50