Adam spends $10 for 1 marble and 1 sticker.
The cost of 1 marble is
19 the cost of 1 sticker.
- How much is the sticker?
- How much is the marble less than the sticker?
(a)
Cost of the marble = 1 u
Cost of the sticker = 9 u
Total cost of the marble and the sticker
= 1 u + 9 u
= 10 u
10 u = 10
1 u = 10 ÷ 10 = 1
Cost of the sticker
= 9 u
= 9 x 1
= $9
(b)
Cost of the marble less than the sticker
= 9 u - 1 u
= 8 u
= 8 x 1
= $8
Answer(s): (a) $9; (b) $8