Adam buys a bead for $8.
He also buys a sticker.
The sticker costs 2 times as much as the bead.
- How much less does the sticker cost than the bead?
- How much does he spend altogether?
- How much are 3 stickers?
- How much are 3 stickers and 4 beads?
(a)
Choose the cheaper item to be 1 u.
The sticker costs 2 times as much as the bead.
The bead is cheaper.
Cost of the bead = 1 u = $8
Cost of the sticker = 2 u
Amount that the bead costs less than the sticker
= 2 u - 1 u
= 1 u
= 1 x 8
= $8
(b)
Total amount that Adam spends
= 1 u + 2 u
= 3 u
= 3 x 8
= $24
(c)
Cost of 3 stickers
= 3 x 2 u
= 6 u
= 6 x 8
= $48
(d )
Cost of 3 stickers and 4 beads
= 3 x 2 u + 4 x 1 u
= 6 u + 4 u
= 10 u
= 10 x 8
= $80
Answer(s): (a) $8; (b) $24; (c) $48; (d) $80