Fill in the blanks.
Abdul spends
16 of his money on 3 pens and 5 coins.
Each coin costs five times as much as each pen.
Let the price of 1 pen be 1 u.
- Cost of 1 coin = _____ u
- Amount that Abdul has spent = _____ u
- Amount that Abdul has left = _____ u
- Amount that Abdul has at first = _____ u
(a)
Change X times into units.
Cost of 1 pen = 1 u
Cost of 1 coin = 5 x 1 u = 5 u
(b)
Amount that Abdul has spent
= 3 x 1 u + 5 x 5 u
= 3 u + 25 u
= 28 u
(c)
Fraction of the money he has left
= 1 -
16 =
56 16 of his money = 28 u
56 of his money = 5 x 28 u = 140 u
Amount that Abdul has left = 140 u
(d)
Amount that Abdul has at first
= 28 u + 140 u
= 168 u
Answer(s): (a) 5; (b) 28; (c) 140; (d) 168