Fill in the blanks.
Adam spends
14 of his money on 3 cards and 3 pencils.
Each pencil costs five times as much as each card.
Let the price of 1 card be 1 u.
- Cost of 1 pencil = _____ 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 card = 1 u
Cost of 1 pencil = 5 x 1 u = 5 u
(b)
Amount that Adam has spent
= 3 x 1 u + 3 x 5 u
= 3 u + 15 u
= 18 u
(c)
Fraction of the money he has left
= 1 -
14 =
34 14 of his money = 18 u
34 of his money = 3 x 18 u = 54 u
Amount that Adam has left = 54 u
(d)
Amount that Adam has at first
= 18 u + 54 u
= 72 u
Answer(s): (a) 5; (b) 18; (c) 54; (d) 72