1 sticker costs $6.
For every 10 stickers bought, a discount of $5 is given.
- How much do 10 stickers cost?
- How much do 19 stickers cost?
- How much do 34 stickers cost?
(a)
Cost of every 10 stickers
= 10 x 6 - 5
= 60 - 5
= $55
(b)
Number of stickers that do not belong to a set
= 19 ÷ 10
= 1 r 9
Cost of the 9 extra stickers
= 9 x 6
= $54
Cost of 19 stickers
= 55 + 54
= $109
(c)
Number of sets of 10 stickers
= 34 ÷ 10
= 3 r 4
Cost of 30 stickers
= 3 x 55
= $165
Cost of 4 stickers
= 4 x 6
= $24
Cost of 34 stickers
= 165 + 24
= $189
Answer(s): (a) $55; (b) $109; (c) $189