Fill in the blanks.
Aaron spends
15 of his money on 4 erasers and 4 pencils.
Each pencil costs twice as much as each eraser.
Let the price of 1 eraser be 1 u.
- Cost of 1 pencil = _____ u
- Amount that Aaron has spent = _____ u
- Amount that Aaron has left = _____ u
- Amount that Aaron has at first = _____ u
(a)
Change X times into units.
Cost of 1 eraser = 1 u
Cost of 1 pencil = 2 x 1 u = 2 u
(b)
Amount that Aaron has spent
= 4 x 1 u + 4 x 2 u
= 4 u + 8 u
= 12 u
(c)
Fraction of the money he has left
= 1 -
15 =
45 15 of his money = 12 u
45 of his money = 4 x 12 u = 48 u
Amount that Aaron has left = 48 u
(d)
Amount that Aaron has at first
= 12 u + 48 u
= 60 u
Answer(s): (a) 2; (b) 12; (c) 48; (d) 60