Ответы на вопрос:
(4/5+1/6)(23 2/3-15 5/9)45/58-1/2=(24/30+5/30)(23 6/9-15 5/9)845/58-1/2=29/30(8 1/9)45/58-1/2=(2945)/(3058)73/9-1/2=3/4*73/9-1/2=73/12-1/2=67/12=5 7/12
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