Adam spends $4 for 1 sticker and 1 marble.
The cost of 1 sticker is
13 the cost of 1 marble.
- How much is the marble?
- How much is the sticker less than the marble?
(a)
Cost of the sticker = 1 u
Cost of the marble = 3 u
Total cost of the sticker and the marble
= 1 u + 3 u
= 4 u
4 u = 4
1 u = 4 ÷ 4 = 1
Cost of the marble
= 3 u
= 3 x 1
= $3
(b)
Cost of the sticker less than the marble
= 3 u - 1 u
= 2 u
= 2 x 1
= $2
Answer(s): (a) $3; (b) $2