Fill in the blanks.
Adam spends
16 of his money on 3 pencils and 4 coins.
Each coin costs four times as much as each pencil.
Let the price of 1 pencil be 1 u.
- Cost of 1 coin = _____ u
- Amount that Adam has spent = _____ u
- Amount that Adam has left = _____ u
- Amount that Adam has at first = _____ u
(a)
Change X times into units.
Cost of 1 pencil = 1 u
Cost of 1 coin = 4 x 1 u = 4 u
(b)
Amount that Adam has spent
= 3 x 1 u + 4 x 4 u
= 3 u + 16 u
= 19 u
(c)
Fraction of the money he has left
= 1 -
16 =
56 16 of his money = 19 u
56 of his money = 5 x 19 u = 95 u
Amount that Adam has left = 95 u
(d)
Amount that Adam has at first
= 19 u + 95 u
= 114 u
Answer(s): (a) 4; (b) 19; (c) 95; (d) 114