Fill in the blanks.
Bryan and Charlie have 21 stickers.
Bryan and Adam have 35 stickers.
Adam has thrice as many as stickers as Charlie.
- Number of stickers that Adam has = _____ u
- 1 u = _____
- Number of stickers that Bryan has = _____
(a)
Change information into units.
Adam has thrice as many as stickers as Charlie.
Number of stickers that Charlie has = 1 u
Number of stickers that Adam has = 3 u
(b)
Bryan + 1 u = 21 --- (1)
Bryan + 3 u = 35 --- (2)
(2) - (1)
3 u - 1 u = 35 - 21
2 u = 14
1 u = 14 ÷ 2 = 7
(c)
Number of stickers that Bryan has
= 21 - 1 u
= 21 - 7
= 14
Answer(s): (a) 3; (b) 7; (c) 14