Fill in the blanks.
Aaron spends
15 of his money on 2 cards and 5 marbles.
Each marble costs four times as much as each card.
Let the price of 1 card be 1 u.
- Cost of 1 marble = _____ 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 card = 1 u
Cost of 1 marble = 4 x 1 u = 4 u
(b)
Amount that Aaron has spent
= 2 x 1 u + 5 x 4 u
= 2 u + 20 u
= 22 u
(c)
Fraction of the money he has left
= 1 -
15 =
45 15 of his money = 22 u
45 of his money = 4 x 22 u = 88 u
Amount that Aaron has left = 88 u
(d)
Amount that Aaron has at first
= 22 u + 88 u
= 110 u
Answer(s): (a) 4; (b) 22; (c) 88; (d) 110