Adam pays $42 for 3 beads and 2 stickers.
2 beads cost as much as 1 sticker.
- How much is 1 bead?
- How much is 1 sticker?
- How much is 5 stickers and 4 beads?
(a)
Choose the smaller group to be 1 u.
Cost of 1 bead = 1 u
Cost of 2 beads = 2 u
Cost of 1 sticker = 2 u
Cost of 3 beads
= 3 x 1 u
= 3 u
Cost of 2 stickers
= 2 x 2 u
= 4 u
Total cost of 3 beads and 2 stickers
= 3 u + 4 u
= 7 u
7 u = 42
1 u = 42 ÷ 7 = 6
Cost of 1 bead
= 1 u
= $6
(b)
Cost of 1 sticker
= 2 u
= 2 x 6
= $12
(c)
Cost of 5 stickers and 4 beads
= 5 x 2 u + 4 x 1 u
= 10 u + 4 u
= 14 u
= 14 x 6
= $84
Answer(s): (a) $6; (b) $12; (c) $84
