Xuan paid $11 for 7 tarts and 3 cakes. A cake cost five times as much as a tart.
- Find the cost of a tart in cents.
- How much more did she pay for a cake than a tart?
| |
Tarts |
Cakes |
Total |
| Number |
7 |
3 |
|
| Value |
1 u |
5 u |
|
| Total value |
7 u |
15 u |
22 u |
(a)
Cost of 1 tart = 1 u
Cost of 1 cake = 5 u
Cost of 7 tarts
= 7 x 1 u
= 7 u
Cost of 3 cakes
= 3 x 5 u
= 15 u
Total cost of 7 tarts and 3 cakes
= 7 u + 15 u
= 22 u
$1 = 100¢
$11 = 11 x 100 = 1100¢
22 u = 1100
1 u = 1100 ÷ 22 = 50
Cost of a bun
= 1 u
= 50¢
(b)
Amount that Xuan paid more for a cake than a tart
= 7 u - 1 u
= 6 u
= 6 x 50
= 300¢
300¢ = $3
Answer(s): (a) 50¢ (b) $3
