Answer:
25 is enough and there will be no pizza left over.
Explanation:
We can multiply the 2 1/2 pizza across 10 classes to see how much pizza we need and if if 25 is enough.
An easy way to do this is to turn 2 1/2 into a decimal then multiply by 10 like that.
2 1/2 = 2.5
2.5 × 10 = 25 pizzas
25 is exactly enough with no pizza left over.
Explanation: