= (9 4/8) - 2 1/2 = 9 1/2 - 2 1/2 = 7
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= (73/10 - 69/10) + 3/5 = 4/10 + 3/5 = 2/5 + 3/5 = 5/5 = 1
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= (3 3/9) + 2 1/3 = 3 1/3 + 2 1/3 = 5 2/3
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= 11 3/14 - (6 7/7) = 11 3/14 - 7 = 4 3/14