Adam buys a sticker for $8.
He also buys a bead.
The sticker costs 4 times as much as the bead.
- How much less does the bead cost than the sticker?
- How much does he spend altogether?
- How much are 7 beads?
- What is the difference in cost between 2 stickers and 5 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
Cost of the sticker = 4 u = $8
4 u = 8
1 u = 8 ÷ 4 = 2
Amount that the bead costs less than the sticker
= 4 u - 1 u
= 3 u
= 3 x 2
= $6
(b)
Total amount that Adam spends
= 1 u + 4 u
= 5 u
= 5 x 2
= $10
(c)
Cost of 7 beads
= 7 x 1 u
= 7 u
= 7 x 2
= $14
(d )
Difference in the cost between 6 stickers and 5 beads
= (2 x 4 u) - (5 x 1 u)
= 8 u - 5 u
= 3 u
= 3 x 2
= $6
Answer(s): (a) $6; (b) $10; (c) $14; (d) $6