Fill in the blanks.
Abdul spends
18 of his money on 2 marbles and 2 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 Abdul has spent = _____ u
- Amount that Abdul has left = _____ u
- Amount that Abdul 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 Abdul has spent
= 2 x 1 u + 2 x 2 u
= 2 u + 4 u
= 6 u
(c)
Fraction of the money he has left
= 1 -
18 =
78 18 of his money = 6 u
78 of his money = 7 x 6 u = 42 u
Amount that Abdul has left = 42 u
(d)
Amount that Abdul has at first
= 6 u + 42 u
= 48 u
Answer(s): (a) 2; (b) 6; (c) 42; (d) 48