Fill in the blanks.
Amadeus spends
19 of his money on 5 stickers and 4 beads.
Each bead costs four times as much as each sticker.
Let the price of 1 sticker be 1 u.
- Cost of 1 bead = _____ u
- Amount that Amadeus has spent = _____ u
- Amount that Amadeus has left = _____ u
- Amount that Amadeus has at first = _____ u
(a)
Change X times into units.
Cost of 1 sticker = 1 u
Cost of 1 bead = 4 x 1 u = 4 u
(b)
Amount that Amadeus has spent
= 5 x 1 u + 4 x 4 u
= 5 u + 16 u
= 21 u
(c)
Fraction of the money he has left
= 1 -
19 =
89 19 of his money = 21 u
89 of his money = 8 x 21 u = 168 u
Amount that Amadeus has left = 168 u
(d)
Amount that Amadeus has at first
= 21 u + 168 u
= 189 u
Answer(s): (a) 4; (b) 21; (c) 168; (d) 189