Adam pays $39 for 5 stickers and 4 beads.
10 stickers cost as much as 5 beads.
- How much is 1 sticker?
- How much is 1 bead?
- How much is 5 beads and 4 stickers?
(a)
Choose the smaller group to be 1 u.
Cost of 10 stickers = Cost of 5 beads
Cost of 2 stickers = Cost of 1 bead
Cost of 1 sticker = 1 u
Cost of 1 bead = 2 u
Cost of 5 stickers
= 5 x 1 u
= 5 u
Cost of 4 beads
= 4 x 2 u
= 8 u
Total cost of 5 stickers and 4 beads
= 5 u + 8 u
= 13 u
13 u = 39
1 u = 39 ÷ 13 = 3
Cost of 1 sticker = 1 u = $3
(b)
Cost of 1 bead
= 2 u
= 2 x 3
= $6
(c)
Cost of 5 beads and 4 stickers
= 5 x 2 u + 4 x 1 u
= 10 u + 4 u
= 14 u
= 14 x 3
= $42
Answer(s): (a) $3; (b) $6; (c) $42
