Fill in the blanks.
Alistair spends
16 of his money on 5 marbles and 4 stickers.
Each sticker costs thrice as much as each marble.
Let the price of 1 marble 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 marble = 1 u
Cost of 1 sticker = 3 x 1 u = 3 u
(b)
Amount that Alistair has spent
= 5 x 1 u + 4 x 3 u
= 5 u + 12 u
= 17 u
(c)
Fraction of the money he has left
= 1 -
16 =
56 16 of his money = 17 u
56 of his money = 5 x 17 u = 85 u
Amount that Alistair has left = 85 u
(d)
Amount that Alistair has at first
= 17 u + 85 u
= 102 u
Answer(s): (a) 3; (b) 17; (c) 85; (d) 102