Adam pays $40 for a sticker and a bead.
The bead costs four times as much as the sticker.
- Find the cost of the sticker.
- Find the cost of the bead.
- Find the difference in the cost of the bead and the sticker.
(a)
Choose the cheaper item to be 1 u.
The bead costs four times as much as the sticker.
The sticker is cheaper.
Cost of the sticker = 1 u
Cost of the bead = 4 u
Total cost = 1 u + 4 u = 5 u
5 u = 40
1 u = 40 ÷ 5 = 8
Cost of the sticker
= 1 u
= $8
(b)
Cost of the bead
= 4 u
= 4 x 8
= $32
(c)
Difference in the cost of the bead and the sticker
= 4 u - 1 u
= 3 u
= 3 x 8
= $24
Answer(s): (a) $8; (b) $32; (c) $24