Fill in the blanks.
Alan spends
15 of his money on 3 stickers and 3 coins.
Each coin costs four times as much as each sticker.
Let the price of 1 sticker be 1 u.
- Cost of 1 coin = _____ u
- Amount that Alan has spent = _____ u
- Amount that Alan has left = _____ u
- Amount that Alan has at first = _____ u
(a)
Change X times into units.
Cost of 1 sticker = 1 u
Cost of 1 coin = 4 x 1 u = 4 u
(b)
Amount that Alan has spent
= 3 x 1 u + 3 x 4 u
= 3 u + 12 u
= 15 u
(c)
Fraction of the money he has left
= 1 -
15 =
45 15 of his money = 15 u
45 of his money = 4 x 15 u = 60 u
Amount that Alan has left = 60 u
(d)
Amount that Alan has at first
= 15 u + 60 u
= 75 u
Answer(s): (a) 4; (b) 15; (c) 60; (d) 75