1 sticker costs $6.
For every 10 stickers bought, a discount of $6 is given.
- How much do 10 stickers cost?
- How much do 17 stickers cost?
- How much do 38 stickers cost?
(a)
Cost of every 10 stickers
= 10 x 6 - 6
= 60 - 6
= $54
(b)
Number of stickers that do not belong to a set
= 17 ÷ 10
= 1 r 7
Cost of the 7 extra stickers
= 7 x 6
= $42
Cost of 17 stickers
= 54 + 42
= $96
(c)
Number of sets of 10 stickers
= 38 ÷ 10
= 3 r 8
Cost of 30 stickers
= 3 x 54
= $162
Cost of 8 stickers
= 8 x 6
= $48
Cost of 38 stickers
= 162 + 48
= $210
Answer(s): (a) $54; (b) $96; (c) $210