Adam buys a bead for $10.
He also buys a sticker.
The bead costs 5 times as much as the sticker.
- How much less does the sticker cost than the bead?
- How much does he spend altogether?
- How much are 5 stickers?
- What is the difference in cost between 2 beads and 2 stickers?
(a)
Choose the cheaper item to be 1 u.
The bead costs 5 times as much as the sticker.
The sticker is cheaper.
Cost of the sticker = 1 u
Cost of the bead = 5 u = $10
5 u = 10
1 u = 10 ÷ 5 = 2
Amount that the sticker costs less than the bead
= 5 u - 1 u
= 4 u
= 4 x 2
= $8
(b)
Total amount that Adam spends
= 1 u + 5 u
= 6 u
= 6 x 2
= $12
(c)
Cost of 5 stickers
= 5 x 1 u
= 5 u
= 5 x 2
= $10
(d )
Difference in the cost between 8 beads and 2 stickers
= (2 x 5 u) - (2 x 1 u)
= 10 u - 2 u
= 8 u
= 8 x 2
= $16
Answer(s): (a) $8; (b) $12; (c) $10; (d) $16