Question

andrea put 2 quarts of water and 1/2 cups of lemon juice in a pitcher how many total cupsof liquid are in a pitcher

Answer 1

2 quarters is 2/4 which is 1/2 so all you are doing is 1/2 + 1/2 which is just one

Answer 2

4 quarts is a whole so 2 quarts would be 1/2
1 cup is equal to 4 quarts but a half a cup is only 2 quarts which again is 1/2 so...
1/2+1/2=1