Fill in the blanks.
Adam and Charlie have 9 stickers.
Adam and Bryan have 19 stickers.
Bryan has thrice as many as stickers as Charlie.
- Number of stickers that Bryan has = _____ u
- 1 u = _____
- Number of stickers that Adam has = _____
(a)
Change information into units.
Bryan has thrice as many as stickers as Charlie.
Number of stickers that Charlie has = 1 u
Number of stickers that Bryan has = 3 u
(b)
Adam + 1 u = 9 --- (1)
Adam + 3 u = 19 --- (2)
(2) - (1)
3 u - 1 u = 19 - 9
2 u = 10
1 u = 10 ÷ 2 = 5
(c)
Number of stickers that Adam has
= 9 - 1 u
= 9 - 5
= 4
Answer(s): (a) 3; (b) 5; (c) 4