Ответ:4.2/7-3.2/9-5.5/7+1.1/3-5.1/9+2.3/7=6
а)4.2/7-5.5/7+2.3/7=30/7-40/7+17/7=1,
б)-3.2/9-5.1/9=-29/9-46/9=-75/9
в)1-75/9+4/3=(9-75+12)/9= -54/9=-6
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Ответ:4.2/7-3.2/9-5.5/7+1.1/3-5.1/9+2.3/7=6
а)4.2/7-5.5/7+2.3/7=30/7-40/7+17/7=1,
б)-3.2/9-5.1/9=-29/9-46/9=-75/9
в)1-75/9+4/3=(9-75+12)/9= -54/9=-6