Jean paid $9 for 6 shortbreads and 3 pies. A pie cost thrice as much as a shortbread.
- Find the cost of a shortbread in cents.
- How much more did she pay for a pie than a shortbread?
| |
Shortbreads |
Pies |
Total |
| Number |
6 |
3 |
|
| Value |
1 u |
3 u |
|
| Total value |
6 u |
9 u |
15 u |
(a)
Cost of 1 shortbread = 1 u
Cost of 1 pie = 3 u
Cost of 6 shortbreads
= 6 x 1 u
= 6 u
Cost of 3 pies
= 3 x 3 u
= 9 u
Total cost of 6 shortbreads and 3 pies
= 6 u + 9 u
= 15 u
$1 = 100¢
$9 = 9 x 100 = 900¢
15 u = 900
1 u = 900 ÷ 15 = 60
Cost of a bun
= 1 u
= 60¢
(b)
Amount that Jean paid more for a pie than a shortbread
= 6 u - 1 u
= 5 u
= 5 x 60
= 300¢
300¢ = $3
Answer(s): (a) 60¢ (b) $3
