Fill in the blanks.
Abel spends
19 of his money on 4 stickers and 5 coins.
Each coin costs twice as much as each sticker.
Let the price of 1 sticker be 1 u.
- Cost of 1 coin = _____ u
- Amount that Abel has spent = _____ u
- Amount that Abel has left = _____ u
- Amount that Abel has at first = _____ u
(a)
Change X times into units.
Cost of 1 sticker = 1 u
Cost of 1 coin = 2 x 1 u = 2 u
(b)
Amount that Abel has spent
= 4 x 1 u + 5 x 2 u
= 4 u + 10 u
= 14 u
(c)
Fraction of the money he has left
= 1 -
19 =
89 19 of his money = 14 u
89 of his money = 8 x 14 u = 112 u
Amount that Abel has left = 112 u
(d)
Amount that Abel has at first
= 14 u + 112 u
= 126 u
Answer(s): (a) 2; (b) 14; (c) 112; (d) 126