Fill in the blanks.
Charlie and Adam have 21 stickers.
Charlie and Bryan have 43 stickers.
Bryan has thrice as many as stickers as Adam.
- Number of stickers that Bryan has = _____ u
- 1 u = _____
- Number of stickers that Charlie has = _____
(a)
Change information into units.
Bryan has thrice as many as stickers as Adam.
Number of stickers that Adam has = 1 u
Number of stickers that Bryan has = 3 u
(b)
Charlie + 1 u = 21 --- (1)
Charlie + 3 u = 43 --- (2)
(2) - (1)
3 u - 1 u = 43 - 21
2 u = 22
1 u = 22 ÷ 2 = 11
(c)
Number of stickers that Charlie has
= 21 - 1 u
= 21 - 11
= 10
Answer(s): (a) 3; (b) 11; (c) 10