Tom spent
23 of his allowance on a mini-helicopter. He spent
13 of the remaining allowance on a marble.
- What fraction of his allowance was left?
- If he had left $10, how much allowance did Tom have at first?
(a)
Fraction of allowance left after spending on a mini-helicopter
= 1 -
23=
13Fraction of remaining allowance left
= 1 -
13=
23Fraction of his allowance left
=
13 x
23=
29(b)
Amount that Tom had at first = 9 u
Amount that Tom had left = 2 u
2 u = 10
1 u = 10 ÷ 2 = 5
Total amount that Tom had at first
= 9 u
= 9 x 5
= $45
Answer(s): (a)
29; (b) $45