Fill in the blanks.
Amadeus spends
16 of his money on 5 marbles and 3 pencils.
Each pencil costs four times as much as each marble.
Let the price of 1 marble be 1 u.
- Cost of 1 pencil = _____ u
- Amount that Amadeus has spent = _____ u
- Amount that Amadeus has left = _____ u
- Amount that Amadeus has at first = _____ u
(a)
Change X times into units.
Cost of 1 marble = 1 u
Cost of 1 pencil = 4 x 1 u = 4 u
(b)
Amount that Amadeus has spent
= 5 x 1 u + 3 x 4 u
= 5 u + 12 u
= 17 u
(c)
Fraction of the money he has left
= 1 -
16 =
56 16 of his money = 17 u
56 of his money = 5 x 17 u = 85 u
Amount that Amadeus has left = 85 u
(d)
Amount that Amadeus has at first
= 17 u + 85 u
= 102 u
Answer(s): (a) 4; (b) 17; (c) 85; (d) 102