A toy car costs $90.
It costs 9 times as much as a doll.
- How much is the doll?
- How much is the toy car more than the doll?
- How much will 1 toy car and 1 doll cost?
- How much will 4 toy cars and 3 dolls cost?
Choose the cheaper item to be 1 u.
The toy car costs 9 times as much as the doll.
The doll is cheaper.
Cost of the toy car = 9 u = $90
Cost of the doll = 1 u
(a)
Cost of the doll
= 90 ÷ 9
= $10
(b)
Cost of the toy car more than the doll
= 9 u - 1 u
= 8 u
= 8 x 10
= $80
(c)
Cost of 1 toy car and 1 doll
= 9 u + 1 u
= 10 u
= 10 x 10
= $100
(d)
Cost of 4 toy cars and 3 dolls
= 4 x 9 u + 3 x 1 u
= 36 u + 3 u
= 39 u
= 39 x 10
= $390
Answer(s): (a) $10; (b) $80; (c) $100; (d) $390