а)1 1/2-2/3=3/2-2/3=9/6-4/6=5/6
в)11/8-1/4-9/8-1/4-9/8-2/8=7/8
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а)1 1/2-2/3=3/2-2/3=9/6-4/6=5/6
в)11/8-1/4-9/8-1/4-9/8-2/8=7/8