1 sticker costs $7.
For every 10 stickers bought, a discount of $5 is given.
- How much do 10 stickers cost?
- How much do 16 stickers cost?
- How much do 26 stickers cost?
(a)
Cost of every 10 stickers
= 10 x 7 - 5
= 70 - 5
= $65
(b)
Number of stickers that do not belong to a set
= 16 ÷ 10
= 1 r 6
Cost of the 6 extra stickers
= 6 x 7
= $42
Cost of 16 stickers
= 65 + 42
= $107
(c)
Number of sets of 10 stickers
= 26 ÷ 10
= 2 r 6
Cost of 20 stickers
= 2 x 65
= $130
Cost of 6 stickers
= 6 x 7
= $42
Cost of 26 stickers
= 130 + 42
= $172
Answer(s): (a) $65; (b) $107; (c) $172