Fill in the blanks.
Ali spends
15 of his money on 4 pens and 4 beads.
Each bead costs five times as much as each pen.
Let the price of 1 pen be 1 u.
- Cost of 1 bead = _____ u
- Amount that Ali has spent = _____ u
- Amount that Ali has left = _____ u
- Amount that Ali has at first = _____ u
(a)
Change X times into units.
Cost of 1 pen = 1 u
Cost of 1 bead = 5 x 1 u = 5 u
(b)
Amount that Ali has spent
= 4 x 1 u + 4 x 5 u
= 4 u + 20 u
= 24 u
(c)
Fraction of the money he has left
= 1 -
15 =
45 15 of his money = 24 u
45 of his money = 4 x 24 u = 96 u
Amount that Ali has left = 96 u
(d)
Amount that Ali has at first
= 24 u + 96 u
= 120 u
Answer(s): (a) 5; (b) 24; (c) 96; (d) 120