1 sticker costs $8.
For every 10 stickers bought, a discount of $7 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 8 - 7
= 80 - 7
= $73
(b)
Number of stickers that do not belong to a set
= 18 ÷ 10
= 1 r 8
Cost of the 8 extra stickers
= 8 x 8
= $64
Cost of 18 stickers
= 73 + 64
= $137
(c)
Number of sets of 10 stickers
= 32 ÷ 10
= 3 r 2
Cost of 30 stickers
= 3 x 73
= $219
Cost of 2 stickers
= 2 x 8
= $16
Cost of 32 stickers
= 219 + 16
= $235
Answer(s): (a) $73; (b) $137; (c) $235