Adam pays $16 for 2 beads and 3 stickers.
10 beads cost as much as 5 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 10 beads = Cost of 5 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 3 stickers
= 3 x 2 u
= 6 u
Total cost of 2 beads and 3 stickers
= 2 u + 6 u
= 8 u
8 u = 16
1 u = 16 ÷ 8 = 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