Пошаговое объяснение:
-1 1/27:7 7/9= - 28/27:70/9=
= - 28/27×9/70= - 2/15
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Пошаговое объяснение:
-1 1/27:7 7/9= - 28/27:70/9=
= - 28/27×9/70= - 2/15