Fill in the blanks.
Alan spends
13 of his money on 5 marbles and 3 buttons.
Each button costs twice as much as each marble.
Let the price of 1 marble be 1 u.
- Cost of 1 button = _____ 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 marble = 1 u
Cost of 1 button = 2 x 1 u = 2 u
(b)
Amount that Alan has spent
= 5 x 1 u + 3 x 2 u
= 5 u + 6 u
= 11 u
(c)
Fraction of the money he has left
= 1 -
13 =
23 13 of his money = 11 u
23 of his money = 2 x 11 u = 22 u
Amount that Alan has left = 22 u
(d)
Amount that Alan has at first
= 11 u + 22 u
= 33 u
Answer(s): (a) 2; (b) 11; (c) 22; (d) 33