Adam buys a marble for $5.
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 5 stickers?
- How much are 2 stickers and 4 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 = $5
Cost of the sticker = 4 u
Amount that the marble costs less than the sticker
= 4 u - 1 u
= 3 u
= 3 x 5
= $15
(b)
Total amount that Adam spends
= 1 u + 4 u
= 5 u
= 5 x 5
= $25
(c)
Cost of 5 stickers
= 5 x 4 u
= 20 u
= 20 x 5
= $100
(d )
Cost of 2 stickers and 4 marbles
= 2 x 4 u + 4 x 1 u
= 8 u + 4 u
= 12 u
= 12 x 5
= $60
Answer(s): (a) $15; (b) $25; (c) $100; (d) $60