Fill in the blanks.
Albert spends
12 of his money on 4 pens and 4 beads.
Each bead costs thrice as much as each pen.
Let the price of 1 pen be 1 u.
- Cost of 1 bead = _____ u
- Amount that Albert has spent = _____ u
- Amount that Albert has left = _____ u
- Amount that Albert has at first = _____ u
(a)
Change X times into units.
Cost of 1 pen = 1 u
Cost of 1 bead = 3 x 1 u = 3 u
(b)
Amount that Albert has spent
= 4 x 1 u + 4 x 3 u
= 4 u + 12 u
= 16 u
(c)
Fraction of the money he has left
= 1 -
12 =
12 12 of his money = 16 u
12 of his money = 1 x 16 u = 16 u
Amount that Albert has left = 16 u
(d)
Amount that Albert has at first
= 16 u + 16 u
= 32 u
Answer(s): (a) 3; (b) 16; (c) 16; (d) 32