Fill in the blanks.
Ali spends
17 of his money on 5 pens and 4 stickers.
Each sticker costs twice as much as each pen.
Let the price of 1 pen be 1 u.
- Cost of 1 sticker = _____ 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 sticker = 2 x 1 u = 2 u
(b)
Amount that Ali has spent
= 5 x 1 u + 4 x 2 u
= 5 u + 8 u
= 13 u
(c)
Fraction of the money he has left
= 1 -
17 =
67 17 of his money = 13 u
67 of his money = 6 x 13 u = 78 u
Amount that Ali has left = 78 u
(d)
Amount that Ali has at first
= 13 u + 78 u
= 91 u
Answer(s): (a) 2; (b) 13; (c) 78; (d) 91