Fill in the blanks.
Alan spends
13 of his money on 5 beads and 5 pencils.
Each pencil costs thrice as much as each bead.
Let the price of 1 bead be 1 u.
- Cost of 1 pencil = _____ u
- Amount that Alan has spent = _____ u
- Amount that Alan has left = _____ u
- Amount that Alan has at first = _____ u
(a)
Change X times into units.
Cost of 1 bead = 1 u
Cost of 1 pencil = 3 x 1 u = 3 u
(b)
Amount that Alan has spent
= 5 x 1 u + 5 x 3 u
= 5 u + 15 u
= 20 u
(c)
Fraction of the money he has left
= 1 -
13 =
23 13 of his money = 20 u
23 of his money = 2 x 20 u = 40 u
Amount that Alan has left = 40 u
(d)
Amount that Alan has at first
= 20 u + 40 u
= 60 u
Answer(s): (a) 3; (b) 20; (c) 40; (d) 60