Fill in the blanks.
Adam spends
17 of his money on 4 buttons and 5 coins.
Each coin costs thrice as much as each button.
Let the price of 1 button be 1 u.
- Cost of 1 coin = _____ u
- Amount that Adam has spent = _____ u
- Amount that Adam has left = _____ u
- Amount that Adam has at first = _____ u
(a)
Change X times into units.
Cost of 1 button = 1 u
Cost of 1 coin = 3 x 1 u = 3 u
(b)
Amount that Adam has spent
= 4 x 1 u + 5 x 3 u
= 4 u + 15 u
= 19 u
(c)
Fraction of the money he has left
= 1 -
17 =
67 17 of his money = 19 u
67 of his money = 6 x 19 u = 114 u
Amount that Adam has left = 114 u
(d)
Amount that Adam has at first
= 19 u + 114 u
= 133 u
Answer(s): (a) 3; (b) 19; (c) 114; (d) 133