Fill in the blanks.
Amadeus spends
12 of his money on 5 erasers and 4 stickers.
Each sticker costs thrice as much as each eraser.
Let the price of 1 eraser be 1 u.
- Cost of 1 sticker = _____ 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 eraser = 1 u
Cost of 1 sticker = 3 x 1 u = 3 u
(b)
Amount that Amadeus has spent
= 5 x 1 u + 4 x 3 u
= 5 u + 12 u
= 17 u
(c)
Fraction of the money he has left
= 1 -
12 =
12 12 of his money = 17 u
12 of his money = 1 x 17 u = 17 u
Amount that Amadeus has left = 17 u
(d)
Amount that Amadeus has at first
= 17 u + 17 u
= 34 u
Answer(s): (a) 3; (b) 17; (c) 17; (d) 34