He eats 32 from the largest pizzas because 2 x 16 = 32. He eats 16 from the small pizza because 2 x 8 = 16. He eats 48 pieces because 32 + 16 = 48.
This justifies what answer for what question? Q & A:
Albert is wondering how much pizza he can eat in one day. He buys 2 large pizzas and 2 small pizzas. A large pizza has 16 slices and a small pizza has 8 slices. If he eats it all, how many pieces does he eat that day?
48