Fill in the blanks.
Aden spends
19 of his money on 3 erasers and 2 pens.
Each pen costs five times as much as each eraser.
Let the price of 1 eraser be 1 u.
- Cost of 1 pen = _____ u
- Amount that Aden has spent = _____ u
- Amount that Aden has left = _____ u
- Amount that Aden has at first = _____ u
(a)
Change X times into units.
Cost of 1 eraser = 1 u
Cost of 1 pen = 5 x 1 u = 5 u
(b)
Amount that Aden has spent
= 3 x 1 u + 2 x 5 u
= 3 u + 10 u
= 13 u
(c)
Fraction of the money he has left
= 1 -
19 =
89 19 of his money = 13 u
89 of his money = 8 x 13 u = 104 u
Amount that Aden has left = 104 u
(d)
Amount that Aden has at first
= 13 u + 104 u
= 117 u
Answer(s): (a) 5; (b) 13; (c) 104; (d) 117