Adam buys a marble for $2.
He also buys a sticker.
The sticker costs 4 times as much as the marble.
- How much less does the sticker cost than the marble?
- How much does he spend altogether?
- How much are 4 stickers?
- How much are 3 stickers and 5 marbles?
(a)
Choose the cheaper item to be 1 u.
The sticker costs 4 times as much as the marble.
The marble is cheaper.
Cost of the marble = 1 u = $2
Cost of the sticker = 4 u
Amount that the marble 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 4 stickers
= 4 x 4 u
= 16 u
= 16 x 2
= $32
(d )
Cost of 3 stickers and 5 marbles
= 3 x 4 u + 5 x 1 u
= 12 u + 5 u
= 17 u
= 17 x 2
= $34
Answer(s): (a) $6; (b) $10; (c) $32; (d) $34