Fill in the blanks.
Alfred spends
13 of his money on 4 pens and 2 beads.
Each bead costs twice as much as each pen.
Let the price of 1 pen be 1 u.
- Cost of 1 bead = _____ u
- Amount that Alfred has spent = _____ u
- Amount that Alfred has left = _____ u
- Amount that Alfred has at first = _____ u
(a)
Change X times into units.
Cost of 1 pen = 1 u
Cost of 1 bead = 2 x 1 u = 2 u
(b)
Amount that Alfred has spent
= 4 x 1 u + 2 x 2 u
= 4 u + 4 u
= 8 u
(c)
Fraction of the money he has left
= 1 -
13 =
23 13 of his money = 8 u
23 of his money = 2 x 8 u = 16 u
Amount that Alfred has left = 16 u
(d)
Amount that Alfred has at first
= 8 u + 16 u
= 24 u
Answer(s): (a) 2; (b) 8; (c) 16; (d) 24