Fill in the blanks.
Aaron spends
110 of his money on 4 beads and 3 coins.
Each coin costs twice as much as each bead.
Let the price of 1 bead be 1 u.
- Cost of 1 coin = _____ u
- Amount that Aaron has spent = _____ u
- Amount that Aaron has left = _____ u
- Amount that Aaron has at first = _____ u
(a)
Change X times into units.
Cost of 1 bead = 1 u
Cost of 1 coin = 2 x 1 u = 2 u
(b)
Amount that Aaron has spent
= 4 x 1 u + 3 x 2 u
= 4 u + 6 u
= 10 u
(c)
Fraction of the money he has left
= 1 -
110 =
910 110 of his money = 10 u
910 of his money = 9 x 10 u = 90 u
Amount that Aaron has left = 90 u
(d)
Amount that Aaron has at first
= 10 u + 90 u
= 100 u
Answer(s): (a) 2; (b) 10; (c) 90; (d) 100