Ответ:
1.-г.
2.-б.
3.-а.
1/9+7/9=8/9.
5/9-4/9=1/9.
(7/9+4/9)-2/9=1.
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Ответ:
1.-г.
2.-б.
3.-а.
1/9+7/9=8/9.
5/9-4/9=1/9.
(7/9+4/9)-2/9=1.