Fill in the blanks.
Adrian spends
19 of his money on 3 cards and 3 stickers.
Each sticker costs thrice as much as each card.
Let the price of 1 card be 1 u.
- Cost of 1 sticker = _____ u
- Amount that Adrian has spent = _____ u
- Amount that Adrian has left = _____ u
- Amount that Adrian has at first = _____ u
(a)
Change X times into units.
Cost of 1 card = 1 u
Cost of 1 sticker = 3 x 1 u = 3 u
(b)
Amount that Adrian has spent
= 3 x 1 u + 3 x 3 u
= 3 u + 9 u
= 12 u
(c)
Fraction of the money he has left
= 1 -
19 =
89 19 of his money = 12 u
89 of his money = 8 x 12 u = 96 u
Amount that Adrian has left = 96 u
(d)
Amount that Adrian has at first
= 12 u + 96 u
= 108 u
Answer(s): (a) 3; (b) 12; (c) 96; (d) 108