Fill in the blanks.
Alfie spends
16 of his money on 2 pens and 5 cards.
Each card costs four times as much as each pen.
Let the price of 1 pen be 1 u.
- Cost of 1 card = _____ u
- Amount that Alfie has spent = _____ u
- Amount that Alfie has left = _____ u
- Amount that Alfie has at first = _____ u
(a)
Change X times into units.
Cost of 1 pen = 1 u
Cost of 1 card = 4 x 1 u = 4 u
(b)
Amount that Alfie 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 -
16 =
56 16 of his money = 22 u
56 of his money = 5 x 22 u = 110 u
Amount that Alfie has left = 110 u
(d)
Amount that Alfie has at first
= 22 u + 110 u
= 132 u
Answer(s): (a) 4; (b) 22; (c) 110; (d) 132