Adam pays $20 for 2 beads and 4 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 3 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 2 beads
= 2 x 1 u
= 2 u
Cost of 4 stickers
= 4 x 2 u
= 8 u
Total cost of 2 beads and 4 stickers
= 2 u + 8 u
= 10 u
10 u = 20
1 u = 20 ÷ 10 = 2
Cost of 1 bead = 1 u = $2
(b)
Cost of 1 sticker
= 2 u
= 2 x 2
= $4
(c)
Cost of 2 stickers and 3 beads
= 2 x 2 u + 3 x 1 u
= 4 u + 3 u
= 7 u
= 7 x 2
= $14
Answer(s): (a) $2; (b) $4; (c) $14