Answer:
2 pizzas
Explanation:
If there were 5 pizzas to begin with and only 2 out of that 5 were eaten, then that means they ate 2
0 0 0 0 0 pizzas started with
_ _ pizzas ate
0 0 0 pizzas left with
So if there were 3 pizzas left with, then you can subtract 3 from 5 to see how many are gone or eaten.
Hope this Helps!!!