There are 100 stickers in Container G and 90 stickers in Container H.
Some stickers are transferred from Container G to Container H.
Container H has 80 more stickers than Container G.
How many stickers are transferred from Container G to Container H?

	Container G	Container H
Before	100	90
Change	- ?	+ ?
After	1 u	1 u + 80

Total number of stickers
= 100 + 90
= 190

In the end
Total number of stickers = 1 u + 1 u + 80 = 2 u + 80

The total number of stickers at first and in the end remains unchanged.

2 u + 80 = 190
2 u = 190 - 80 = 110

1 u = 110 ÷ 2 = 55

Number of stickers that are transferred from Container G to Container H
= Number of stickers in Container G at first - Number of stickers in Container G in the end
= 100 - 55
= 45

Answer(s): 45