If i had a pizza, and i ate4/8 of the pizza and my sister ate 3/8 of the pizza, how much pizza did we eat

Answer 1

4/8 + 3/8

To add this fraction, first make sure their denominators are equal. Their denominators are already equal (which is 8). And so we can combine now their numerators while denominator stays the same:
(4 + 3)/8 = 7/8