Mary spent
17 of her money on some pens. She spent
16 of the remaining money on some notebooks and
35 of what was left on some highlighters.
- What fraction of her money was left?
- Given that the highlighters cost $20 more than the notebooks, find the sum of money that Mary had at first.
| Pens |
Remaining money |
| 1 |
6 |
| |
Notebooks |
Left |
| |
1 |
5 |
| |
|
Highlighters |
Rest |
| 1 u |
1 u |
3 u |
2 u |
(a)
Fraction of money left after spending on the pens
= 1 -
17 =
67 Fraction of remaining money after spending on the notebooks
= 1 -
16 =
56 Fraction of what was left after spending on the highlighters
= 1 -
35 =
25 Fraction of money that was left =
27 (b)
Amount that Mary spent on the notebooks = 1 u
Amount that Mary spent on the highlighters = 3 u
Amount that the highlighters cost more than the notebooks
= 3 u - 1 u
= 2 u
2 u = 20
1 u = 20 ÷ 2 = 10
Amount that Mary had at first
= 7 u
= 7 x 10
= $70
Answer(s): (a)
27; (b) $70
