Adam pays $27 for 3 beads and 2 stickers.
9 beads cost as much as 3 stickers.
- How much is 1 bead?
- How much is 1 sticker?
- How much is 4 stickers and 2 beads?
(a)
Choose the smaller group to be 1 u.
Cost of 9 beads = Cost of 3 stickers
Cost of 3 beads = Cost of 1 sticker
Cost of 1 bead = 1 u
Cost of 1 sticker = 3 u
Cost of 3 beads
= 3 x 1 u
= 3 u
Cost of 2 stickers
= 2 x 3 u
= 6 u
Total cost of 3 beads and 2 stickers
= 3 u + 6 u
= 9 u
9 u = 27
1 u = 27 ÷ 9 = 3
Cost of 1 bead = 1 u = $3
(b)
Cost of 1 sticker
= 3 u
= 3 x 3
= $9
(c)
Cost of 4 stickers and 2 beads
= 4 x 3 u + 2 x 1 u
= 12 u + 2 u
= 14 u
= 14 x 3
= $42
Answer(s): (a) $3; (b) $9; (c) $42
