Tina paid $6 for 6 biscuits and 3 cakes. A cake cost thrice as much as a biscuit.
- Find the cost of a biscuit in cents.
- How much more did she pay for a cake than a biscuit?
| |
Biscuits |
Cakes |
Total |
| Number |
6 |
3 |
|
| Value |
1 u |
3 u |
|
| Total value |
6 u |
9 u |
15 u |
(a)
Cost of 1 biscuit = 1 u
Cost of 1 cake = 3 u
Cost of 6 biscuits
= 6 x 1 u
= 6 u
Cost of 3 cakes
= 3 x 3 u
= 9 u
Total cost of 6 biscuits and 3 cakes
= 6 u + 9 u
= 15 u
$1 = 100¢
$6 = 6 x 100 = 600¢
15 u = 600
1 u = 600 ÷ 15 = 40
Cost of a bun
= 1 u
= 40¢
(b)
Amount that Tina paid more for a cake than a biscuit
= 6 u - 1 u
= 5 u
= 5 x 40
= 200¢
200¢ = $2
Answer(s): (a) 40¢ (b) $2
