1 sticker costs $5.
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 38 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
= 14 ÷ 10
= 1 r 4
Cost of the 4 extra stickers
= 4 x 5
= $20
Cost of 14 stickers
= 47 + 20
= $67
(c)
Number of sets of 10 stickers
= 38 ÷ 10
= 3 r 8
Cost of 30 stickers
= 3 x 47
= $141
Cost of 8 stickers
= 8 x 5
= $40
Cost of 38 stickers
= 141 + 40
= $181
Answer(s): (a) $47; (b) $67; (c) $181