1 sticker costs $5.
For every 10 stickers bought, a discount of $3 is given.
- How much do 10 stickers cost?
- How much do 17 stickers cost?
- How much do 26 stickers cost?
(a)
Cost of every 10 stickers
= 10 x 5 - 3
= 50 - 3
= $47
(b)
Number of stickers that do not belong to a set
= 17 ÷ 10
= 1 r 7
Cost of the 7 extra stickers
= 7 x 5
= $35
Cost of 17 stickers
= 47 + 35
= $82
(c)
Number of sets of 10 stickers
= 26 ÷ 10
= 2 r 6
Cost of 20 stickers
= 2 x 47
= $94
Cost of 6 stickers
= 6 x 5
= $30
Cost of 26 stickers
= 94 + 30
= $124
Answer(s): (a) $47; (b) $82; (c) $124