Olivia is making pizzas for a pizza party. Each pizza requires 1/3 pound of cheese. How much cheese does she need to make 13 pizzas?

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To solve, we'll need to ___, because we know the SIZE of the groups and the ____, but we don't know the ____.

To solve, we'll need to multiply, because we know the size of the groups (13 pizzas) and the amount of cheese required per pizza (1/3 pound), but we don't know the total amount of cheese needed.

To solve, we'll need to multiply, because we know the SIZE of the groups (1/3 pound of cheese per pizza) and the number of groups (13 pizzas), but we don't know the total amount of cheese needed.

To solve this problem, we'll need to use multiplication because we know the size of the groups (1/3 pound per pizza) and the number of groups (13 pizzas), but we don't know the total amount of cheese needed.