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7 4/9 + 3 3/4=

5 3/4 + 2 1/6=

7 3/5 - 2 1/8=

8 3/8 + 2 1/5=

4 3/7 + 2 1/4=

7 4/9 + 3 3/4 = 67/9 + 15/4 = 403 / 36 = 11 7/36

5 3/4 + 2 1/6 = (5 + 2) + (3/4 + 1/6) = 7 11/12

7 3/5 - 2 1/8 = 38/5 - 17/8 = 219/40 = 5 19/40

8 3/8 + 2 1/5 = (8 + 2) + (3/8 + 1/5) = 10 + 23/40 = 10 23/40

4 3/7 + 2 1/4 = (4+2) + (3/7 + 1/4) = 6 + 19/28 = 6 19/28