Ответ:
3/12+4/12=7/12
8/9+1/9=9/9=1
6/12-3/12=3/12=1/4
4/10-1/10=3/10
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Ответ:
3/12+4/12=7/12
8/9+1/9=9/9=1
6/12-3/12=3/12=1/4
4/10-1/10=3/10
Пошаговое объяснение: