Gwen paid $7 for 5 cupcakes and 3 pizzas. A pizza cost thrice as much as a cupcake.
- Find the cost of a cupcake in cents.
- How much more did she pay for a pizza than a cupcake?
| |
Cupcakes |
Pizzas |
Total |
| Number |
5 |
3 |
|
| Value |
1 u |
3 u |
|
| Total value |
5 u |
9 u |
14 u |
(a)
Cost of 1 cupcake = 1 u
Cost of 1 pizza = 3 u
Cost of 5 cupcakes
= 5 x 1 u
= 5 u
Cost of 3 pizzas
= 3 x 3 u
= 9 u
Total cost of 5 cupcakes and 3 pizzas
= 5 u + 9 u
= 14 u
$1 = 100¢
$7 = 7 x 100 = 700¢
14 u = 700
1 u = 700 ÷ 14 = 50
Cost of a bun
= 1 u
= 50¢
(b)
Amount that Gwen paid more for a pizza than a cupcake
= 5 u - 1 u
= 4 u
= 4 x 50
= 200¢
200¢ = $2
Answer(s): (a) 50¢ (b) $2
