Winnie paid $24 for 6 shortbreads and 8 cakes. A cake cost thrice as much as a shortbread.
- Find the cost of a shortbread in cents.
- How much more did she pay for a cake than a shortbread?
| |
Shortbreads |
Cakes |
Total |
| Number |
6 |
8 |
|
| Value |
1 u |
3 u |
|
| Total value |
6 u |
24 u |
30 u |
(a)
Cost of 1 shortbread = 1 u
Cost of 1 cake = 3 u
Cost of 6 shortbreads
= 6 x 1 u
= 6 u
Cost of 8 cakes
= 8 x 3 u
= 24 u
Total cost of 6 shortbreads and 8 cakes
= 6 u + 24 u
= 30 u
$1 = 100¢
$24 = 24 x 100 = 2400¢
30 u = 2400
1 u = 2400 ÷ 30 = 80
Cost of a bun
= 1 u
= 80¢
(b)
Amount that Winnie paid more for a cake than a shortbread
= 6 u - 1 u
= 5 u
= 5 x 80
= 400¢
400¢ = $4
Answer(s): (a) 80¢ (b) $4
