Adam pays $48 for 6 marbles and 2 stickers.
3 marbles cost as much as 1 sticker.
- How much is 1 marble?
- How much is 1 sticker?
- How much is 4 stickers and 3 marbles?
(a)
Choose the smaller group to be 1 u.
Cost of 1 marble = 1 u
Cost of 3 marbles = 3 u
Cost of 1 sticker = 3 u
Cost of 6 marbles
= 6 x 1 u
= 6 u
Cost of 2 stickers
= 2 x 3 u
= 6 u
Total cost of 6 marbles and 2 stickers
= 6 u + 6 u
= 12 u
12 u = 48
1 u = 48 ÷ 12 = 4
Cost of 1 marble
= 1 u
= $4
(b)
Cost of 1 sticker
= 3 u
= 3 x 4
= $12
(c)
Cost of 4 stickers and 3 marbles
= 4 x 3 u + 3 x 1 u
= 12 u + 3 u
= 15 u
= 15 x 4
= $60
Answer(s): (a) $4; (b) $12; (c) $60