Adam pays $32 for 3 stickers and 4 beads.
5 stickers cost as much as 4 beads.
- How much is 1 sticker?
- How much is 1 bead?
- How much is 3 beads and 4 stickers?
(a)
LCM of 5 and 4 = 20
Cost of 5 stickers = 20 u
Cost of 1 sticker = 20 u ÷ 5 = 4 u
Cost of 4 beads = 20 u
Cost of 1 bead = 20 u ÷ 4 = 5 u
Cost of 3 stickers = 3 x 4 u = 12 u
Cost of 4 beads = 4 x 5 u = 20 u
Total cost of 3 stickers and 4 beads
= 12 u + 20 u
= 32 u
32 u = 32
1 u = 32 ÷ 32 = 1
Cost of 1 sticker
= 4 u
= 4 x 1
= $4
(b)
Cost of 1 bead
= 5 u
= 5 x 1
= $5
(c)
Cost of 3 beads and 4 stickers
= 3 x 5 u + 4 x 4 u
= 15 u + 16 u
= 31 u
= 31 x 1
= $31
Answer(s): (a) $4; (b) $5; (c) $31