How much cheese is needed for 12 sandwiches if each requires 1.5 ounces?

To find out how much cheese is needed for 12 sandwiches when each sandwich requires 1.5 ounces of cheese, you can use multiplication.

First, multiply the number of sandwiches by the amount of cheese needed for each sandwich. The calculation is as follows:

12 sandwiches × 1.5 ounces per sandwich = 18 ounces of cheese.

Therefore, the total amount of cheese required for 12 sandwiches is 18 ounces. This demonstrates the use of proportions and multiplication to solve problems related to quantities needed based on a per-item requirement, which is a common scenario in food preparation and service contexts.