1 sticker costs $7.
For every 10 stickers bought, a discount of $3 is given.
- How much do 10 stickers cost?
- How much do 14 stickers cost?
- How much do 26 stickers cost?
(a)
Cost of every 10 stickers
= 10 x 7 - 3
= 70 - 3
= $67
(b)
Number of stickers that do not belong to a set
= 14 ÷ 10
= 1 r 4
Cost of the 4 extra stickers
= 4 x 7
= $28
Cost of 14 stickers
= 67 + 28
= $95
(c)
Number of sets of 10 stickers
= 26 ÷ 10
= 2 r 6
Cost of 20 stickers
= 2 x 67
= $134
Cost of 6 stickers
= 6 x 7
= $42
Cost of 26 stickers
= 134 + 42
= $176
Answer(s): (a) $67; (b) $95; (c) $176