Adam pays $21 for 5 beads and 4 stickers.
8 beads cost as much as 2 stickers.
- How much is 1 bead?
- How much is 1 sticker?
- How much is 3 stickers and 4 beads?
(a)
Choose the smaller group to be 1 u.
Cost of 8 beads = Cost of 2 stickers
Cost of 4 beads = Cost of 1 sticker
Cost of 1 bead = 1 u
Cost of 1 sticker = 4 u
Cost of 5 beads
= 5 x 1 u
= 5 u
Cost of 4 stickers
= 4 x 4 u
= 16 u
Total cost of 5 beads and 4 stickers
= 5 u + 16 u
= 21 u
21 u = 21
1 u = 21 ÷ 21 = 1
Cost of 1 bead = 1 u = $1
(b)
Cost of 1 sticker
= 4 u
= 4 x 1
= $4
(c)
Cost of 3 stickers and 4 beads
= 3 x 4 u + 4 x 1 u
= 12 u + 4 u
= 16 u
= 16 x 1
= $16
Answer(s): (a) $1; (b) $4; (c) $16
