Fill in the blanks.
Alistair spends
12 of his money on 2 pens and 3 stickers.
Each sticker costs four times as much as each pen.
Let the price of 1 pen be 1 u.
- Cost of 1 sticker = _____ u
- Amount that Alistair has spent = _____ u
- Amount that Alistair has left = _____ u
- Amount that Alistair has at first = _____ u
(a)
Change X times into units.
Cost of 1 pen = 1 u
Cost of 1 sticker = 4 x 1 u = 4 u
(b)
Amount that Alistair has spent
= 2 x 1 u + 3 x 4 u
= 2 u + 12 u
= 14 u
(c)
Fraction of the money he has left
= 1 -
12 =
12 12 of his money = 14 u
12 of his money = 1 x 14 u = 14 u
Amount that Alistair has left = 14 u
(d)
Amount that Alistair has at first
= 14 u + 14 u
= 28 u
Answer(s): (a) 4; (b) 14; (c) 14; (d) 28