Adam spends $9 for 1 sticker and 1 marble.
The cost of 1 sticker is
45 the cost of 1 marble.
- How much is the marble?
- How much is the sticker less than the marble?
(a)
Cost of the sticker = 4 u
Cost of the marble = 5 u
Total cost of the sticker and the marble
= 4 u + 5 u
= 9 u
9 u = 9
1 u = 9 ÷ 9 = 1
Cost of the marble
= 5 u
= 5 x 1
= $5
(b)
Cost of the sticker less than the marble
= 5 u - 4 u
= 1 u
= 1 x 1
= $1
Answer(s): (a) $5; (b) $1