Adam spends $9 for 1 sticker and 1 marble.
The cost of 1 sticker is
27 the cost of 1 marble.
- How much is the marble?
- How much is the marble more than the sticker?
(a)
Cost of the sticker = 2 u
Cost of the marble = 7 u
Total cost of the sticker and the marble
= 2 u + 7 u
= 9 u
9 u = 9
1 u = 9 ÷ 9 = 1
Cost of the marble
= 7 u
= 7 x 1
= $7
(b)
Cost of the marble more than the sticker
= 7 u - 2 u
= 5 u
= 5 x 1
= $5
Answer(s): (a) $7; (b) $5