Пожалуйста помогите с математикой!!! 1) выполните деление 1/10: 1/6=
2)Сократите дробь 27/63 а)3/7 б) 1/21 в)27/7 г)1/3 д)7/3
3)Вычислите 11/5-2/5+1/7=
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