Fill in the blanks.
Bryan and Adam have 12 stickers.
Bryan and Charlie have 18 stickers.
Charlie has thrice as many as stickers as Adam.
- Number of stickers that Charlie has = _____ u
- 1 u = _____
- Number of stickers that Bryan has = _____
(a)
Change information into units.
Charlie has thrice as many as stickers as Adam.
Number of stickers that Adam has = 1 u
Number of stickers that Charlie has = 3 u
(b)
Bryan + 1 u = 12 --- (1)
Bryan + 3 u = 18 --- (2)
(2) - (1)
3 u - 1 u = 18 - 12
2 u = 6
1 u = 6 ÷ 2 = 3
(c)
Number of stickers that Bryan has
= 12 - 1 u
= 12 - 3
= 9
Answer(s): (a) 3; (b) 3; (c) 9