How do you calculate 1 and 3 quarters plus 1 and 3 quarters?

Addition of Fraqctions.

1 3/4 + 1 3/4

Bring to Improper fractions.

7/4 + 7/4

Since the denominator is the same at '4' , then just add the numerators.

14/4

Convert to a mixed number.

14/4 = 3 2/4 = 3 1/2 ( The answer)