Ответ:
8 19/20-5 7/10=8 19/20-5 14/20=3 5/20 сокращаем на 5 =3 1/4
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Ответ:
8 19/20-5 7/10=8 19/20-5 14/20=3 5/20 сокращаем на 5 =3 1/4