Fill in the blanks.
Alfred spends
16 of his money on 2 erasers and 3 cards.
Each card costs four times as much as each eraser.
Let the price of 1 eraser be 1 u.
- Cost of 1 card = _____ u
- Amount that Alfred has spent = _____ u
- Amount that Alfred has left = _____ u
- Amount that Alfred has at first = _____ u
(a)
Change X times into units.
Cost of 1 eraser = 1 u
Cost of 1 card = 4 x 1 u = 4 u
(b)
Amount that Alfred 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 -
16 =
56 16 of his money = 14 u
56 of his money = 5 x 14 u = 70 u
Amount that Alfred has left = 70 u
(d)
Amount that Alfred has at first
= 14 u + 70 u
= 84 u
Answer(s): (a) 4; (b) 14; (c) 70; (d) 84