Natalie paid $6 for 6 cookies and 8 pizzas. A pizza cost thrice as much as a cookie.
- Find the cost of a cookie in cents.
- How much more did she pay for a pizza than a cookie?
| |
Cookies |
Pizzas |
Total |
| Number |
6 |
8 |
|
| Value |
1 u |
3 u |
|
| Total value |
6 u |
24 u |
30 u |
(a)
Cost of 1 cookie = 1 u
Cost of 1 pizza = 3 u
Cost of 6 cookies
= 6 x 1 u
= 6 u
Cost of 8 pizzas
= 8 x 3 u
= 24 u
Total cost of 6 cookies and 8 pizzas
= 6 u + 24 u
= 30 u
$1 = 100¢
$6 = 6 x 100 = 600¢
30 u = 600
1 u = 600 ÷ 30 = 20
Cost of a bun
= 1 u
= 20¢
(b)
Amount that Natalie paid more for a pizza than a cookie
= 6 u - 1 u
= 5 u
= 5 x 20
= 100¢
100¢ = $1
Answer(s): (a) 20¢ (b) $1
