Fill in the blanks.
Aden spends
19 of his money on 3 pencils and 4 marbles.
Each marble costs four times as much as each pencil.
Let the price of 1 pencil be 1 u.
- Cost of 1 marble = _____ 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 pencil = 1 u
Cost of 1 marble = 4 x 1 u = 4 u
(b)
Amount that Aden has spent
= 3 x 1 u + 4 x 4 u
= 3 u + 16 u
= 19 u
(c)
Fraction of the money he has left
= 1 -
19 =
89 19 of his money = 19 u
89 of his money = 8 x 19 u = 152 u
Amount that Aden has left = 152 u
(d)
Amount that Aden has at first
= 19 u + 152 u
= 171 u
Answer(s): (a) 4; (b) 19; (c) 152; (d) 171