Risa spent
19 of her money on some staplers. She spent
38 of the remaining money on some notebooks and
45 of what was left on some pencils.
- What fraction of her money was spent on pencils?
- Given that the staplers cost $27 less than the pencils, find the sum of money that Risa spent.
| Staplers |
Remaining money |
| 1 |
8 |
| |
Notebooks |
Left |
| |
3 |
5 |
| |
|
Pencils |
Rest |
| 1 u |
3 u |
4 u |
1 u |
(a)
Fraction of money left after spending on the staplers
= 1 -
19 =
89 Fraction of remaining money after spending on the notebooks
= 1 -
38 =
58 Fraction of what was left after spending on the pencils
= 1 -
45 =
15 Fraction of money that was spent on pencils =
49 (b)
Amount that Risa spent on the staplers = 1 u
Amount that Risa spent on the pencils = 4 u
Amount that the staplers cost less than the pencils
= 4 u - 1 u
= 3 u
3 u = 27
1 u = 27 ÷ 3 = 9
Amount that Risa sent
= 1 u + 3 u + 4 u
= 8 u
= 8 x 9
= $72
Answer(s): (a)
49; (b) $72
