а) 5 5/9+2 1/8=7 49/72
б)5 7/24-3 11/36=143/72
в)2-9/25+3=116/25
г) 7/39-4 7/13=170/39
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а) 5 5/9+2 1/8=7 49/72
б)5 7/24-3 11/36=143/72
в)2-9/25+3=116/25
г) 7/39-4 7/13=170/39