Fill in the blanks.
Abel spends
17 of his money on 3 beads and 4 marbles.
Each marble costs five times as much as each bead.
Let the price of 1 bead be 1 u.
- Cost of 1 marble = _____ 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 bead = 1 u
Cost of 1 marble = 5 x 1 u = 5 u
(b)
Amount that Abel has spent
= 3 x 1 u + 4 x 5 u
= 3 u + 20 u
= 23 u
(c)
Fraction of the money he has left
= 1 -
17 =
67 17 of his money = 23 u
67 of his money = 6 x 23 u = 138 u
Amount that Abel has left = 138 u
(d)
Amount that Abel has at first
= 23 u + 138 u
= 161 u
Answer(s): (a) 5; (b) 23; (c) 138; (d) 161