Adam buys a bead for $4.
He also buys a sticker.
The sticker costs 4 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 4 times as much as the bead.
The bead is cheaper.
Cost of the bead = 1 u = $4
Cost of the sticker = 4 u
Amount that the bead costs less than the sticker
= 4 u - 1 u
= 3 u
= 3 x 4
= $12
(b)
Total amount that Adam spends
= 1 u + 4 u
= 5 u
= 5 x 4
= $20
(c)
Cost of 3 stickers
= 3 x 4 u
= 12 u
= 12 x 4
= $48
(d )
Cost of 3 stickers and 4 beads
= 3 x 4 u + 4 x 1 u
= 12 u + 4 u
= 16 u
= 16 x 4
= $64
Answer(s): (a) $12; (b) $20; (c) $48; (d) $64