Fill in the blanks.
Bryan has ten times as many stickers as Adam.
Bryan gave 30 to Adam.
In the end, Bryan has seven times as many stickers as Adam.

1. Difference in the number of stickers between Bryan and Adam at first = _____ u
2. Difference in the number of stickers between Bryan and Adam in the end = _____ u
3. Difference in the number of stickers Bryan has at first and in the end = _____ u
4. Difference in the number of stickers Adam has at first and in the end = _____ u

	Bryan	Adam	Total
Before	10 x 8 = 80 u	1 x 8 = 8 u	11 x 8 = 88 u
Change	- 30	+ 30
After	7 x 11 = 77 u	1 x 11 = 11 u	8 x 11 = 88 u

(a)
Change X times into units.

There is an internal transfer of 30 stickers from Bryan to Adam.

The total remains unchanged.
LCM of 11 and 8 is 88.

Number of stickers that Bryan gives to Adam
= 80 u - 77 u
= 3 u

Difference in the number of stickers between Bryan and Adam at first
= 80 u - 8 u
= 72 u

(b)
Difference in the number of stickers between Bryan and Adam in the end
= 77 u - 11 u
= 66 u

(c)
Difference in the number of stickers that Bryan has at first and in the end
= 80 u - 77 u
= 3 u

(d)
Difference in the number of stickers that Adam has at first and in the end
= 11 u - 8 u
= 3 u

Answer(s): (a) 72; (b) 66; (c) 3; (d) 3