Fill in the blanks.
Alan spends
14 of his money on 2 marbles and 4 cards.
Each card costs twice as much as each marble.
Let the price of 1 marble be 1 u.
- Cost of 1 card = _____ 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 card = 2 x 1 u = 2 u
(b)
Amount that Alan has spent
= 2 x 1 u + 4 x 2 u
= 2 u + 8 u
= 10 u
(c)
Fraction of the money he has left
= 1 -
14 =
34 14 of his money = 10 u
34 of his money = 3 x 10 u = 30 u
Amount that Alan has left = 30 u
(d)
Amount that Alan has at first
= 10 u + 30 u
= 40 u
Answer(s): (a) 2; (b) 10; (c) 30; (d) 40