Fill in the blanks.
Abel spends
17 of his money on 4 pens and 4 cards.
Each card costs twice as much as each pen.
Let the price of 1 pen be 1 u.
- Cost of 1 card = _____ 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 pen = 1 u
Cost of 1 card = 2 x 1 u = 2 u
(b)
Amount that Abel has spent
= 4 x 1 u + 4 x 2 u
= 4 u + 8 u
= 12 u
(c)
Fraction of the money he has left
= 1 -
17 =
67 17 of his money = 12 u
67 of his money = 6 x 12 u = 72 u
Amount that Abel has left = 72 u
(d)
Amount that Abel has at first
= 12 u + 72 u
= 84 u
Answer(s): (a) 2; (b) 12; (c) 72; (d) 84