а) 3/4+75/6 = 53/4
б) 7/15-5/12 = 1/20
в) 1 2/3+2 7/9 = 4 4/9
г) 6 5/9-3 1/4 = 3 11/36
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а) 3/4+75/6 = 53/4
б) 7/15-5/12 = 1/20
в) 1 2/3+2 7/9 = 4 4/9
г) 6 5/9-3 1/4 = 3 11/36