6 1/9 - 4 8/9 = 5 10/9 - 4 8/9 = 1 2/9
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8 3/7 - 4 4/7 = 7 10/7 - 4 4/7 = 3 6/7
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(1 1/8 + 8 5/8) - 3 2/8 = 9 6/8 - 3 2/8 = 6 4/8 = 6 1/2
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4 8/11 + (5 2/11 - 3 7/11)= 4 8/11 + ( 4 13/11 - 3 7/11) = 4 8/11 + 1 6/11 = 5 14/11 = 6 3/11
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16 10/11 - (1 4/11 + 7 9/11) = 16 10/11 - 8 13/11 = 16 10/11 - 9 2/11 =
7 8/11