1 sticker costs $5.
For every 10 stickers bought, a discount of $4 is given.
- How much do 10 stickers cost?
- How much do 16 stickers cost?
- How much do 22 stickers cost?
(a)
Cost of every 10 stickers
= 10 x 5 - 4
= 50 - 4
= $46
(b)
Number of stickers that do not belong to a set
= 16 ÷ 10
= 1 r 6
Cost of the 6 extra stickers
= 6 x 5
= $30
Cost of 16 stickers
= 46 + 30
= $76
(c)
Number of sets of 10 stickers
= 22 ÷ 10
= 2 r 2
Cost of 20 stickers
= 2 x 46
= $92
Cost of 2 stickers
= 2 x 5
= $10
Cost of 22 stickers
= 92 + 10
= $102
Answer(s): (a) $46; (b) $76; (c) $102