Adam pays $9 for 2 beads and 5 stickers.
2 beads cost as much as 4 stickers.
- How much is 1 bead?
- How much is 1 sticker?
- How much is 3 stickers and 4 beads?
(a)
LCM of 2 and 4 = 4
Cost of 2 beads = 4 u
Cost of 1 bead = 4 u ÷ 2 = 2 u
Cost of 4 stickers = 4 u
Cost of 1 sticker = 4 u ÷ 4 = 1 u
Cost of 2 beads = 2 x 2 u = 4 u
Cost of 5 stickers = 5 x 1 u = 5 u
Total cost of 2 beads and 5 stickers
= 4 u + 5 u
= 9 u
9 u = 9
1 u = 9 ÷ 9 = 1
Cost of 1 bead
= 2 u
= 2 x 1
= $2
(b)
Cost of 1 sticker
= 1 u
= 1 x 1
= $1
(c)
Cost of 3 stickers and 4 beads
= 3 x 1 u + 4 x 2 u
= 3 u + 8 u
= 11 u
= 11 x 1
= $11
Answer(s): (a) $2; (b) $1; (c) $11
