Fill in the blanks.
Alan spends
13 of his money on 4 pencils and 4 marbles.
Each marble costs twice as much as each pencil.
Let the price of 1 pencil be 1 u.
- Cost of 1 marble = _____ u
- Amount that Alan has spent = _____ u
- Amount that Alan has left = _____ u
- Amount that Alan has at first = _____ u
(a)
Change X times into units.
Cost of 1 pencil = 1 u
Cost of 1 marble = 2 x 1 u = 2 u
(b)
Amount that Alan 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 -
13 =
23 13 of his money = 12 u
23 of his money = 2 x 12 u = 24 u
Amount that Alan has left = 24 u
(d)
Amount that Alan has at first
= 12 u + 24 u
= 36 u
Answer(s): (a) 2; (b) 12; (c) 24; (d) 36