Adam pays $40 for 4 beads and 3 stickers.
8 beads cost as much as 4 stickers.
- How much is 1 bead?
- How much is 1 sticker?
- How much is 2 stickers and 5 beads?
(a)
Choose the smaller group to be 1 u.
Cost of 8 beads = Cost of 4 stickers
Cost of 2 beads = Cost of 1 sticker
Cost of 1 bead = 1 u
Cost of 1 sticker = 2 u
Cost of 4 beads
= 4 x 1 u
= 4 u
Cost of 3 stickers
= 3 x 2 u
= 6 u
Total cost of 4 beads and 3 stickers
= 4 u + 6 u
= 10 u
10 u = 40
1 u = 40 ÷ 10 = 4
Cost of 1 bead = 1 u = $4
(b)
Cost of 1 sticker
= 2 u
= 2 x 4
= $8
(c)
Cost of 2 stickers and 5 beads
= 2 x 2 u + 5 x 1 u
= 4 u + 5 u
= 9 u
= 9 x 4
= $36
Answer(s): (a) $4; (b) $8; (c) $36
