Fill in the blanks.
Aaron spends
18 of his money on 5 buttons and 2 stickers.
Each sticker costs five times as much as each button.
Let the price of 1 button be 1 u.
- Cost of 1 sticker = _____ u
- Amount that Aaron has spent = _____ u
- Amount that Aaron has left = _____ u
- Amount that Aaron has at first = _____ u
(a)
Change X times into units.
Cost of 1 button = 1 u
Cost of 1 sticker = 5 x 1 u = 5 u
(b)
Amount that Aaron has spent
= 5 x 1 u + 2 x 5 u
= 5 u + 10 u
= 15 u
(c)
Fraction of the money he has left
= 1 -
18 =
78 18 of his money = 15 u
78 of his money = 7 x 15 u = 105 u
Amount that Aaron has left = 105 u
(d)
Amount that Aaron has at first
= 15 u + 105 u
= 120 u
Answer(s): (a) 5; (b) 15; (c) 105; (d) 120