1 sticker costs $4.
For every 10 stickers bought, a discount of $6 is given.
- How much do 10 stickers cost?
- How much do 18 stickers cost?
- How much do 32 stickers cost?
(a)
Cost of every 10 stickers
= 10 x 4 - 6
= 40 - 6
= $34
(b)
Number of stickers that do not belong to a set
= 18 ÷ 10
= 1 r 8
Cost of the 8 extra stickers
= 8 x 4
= $32
Cost of 18 stickers
= 34 + 32
= $66
(c)
Number of sets of 10 stickers
= 32 ÷ 10
= 3 r 2
Cost of 30 stickers
= 3 x 34
= $102
Cost of 2 stickers
= 2 x 4
= $8
Cost of 32 stickers
= 102 + 8
= $110
Answer(s): (a) $34; (b) $66; (c) $110