Решите пожалуйста 6,8\4 3,6\8 0,028\70 10,5\30

6 , 8 / 4 = 6 целых 8 / 10 / 4 = ( 6 * 10 + 8 ) / 10 / 4 = ( 60 + 8 ) / 10 / 4 = 68 / 10 / 4 = 68 / 10 / ( 4 / 1 ) = 68 / 10 * ( 1 / 4 ) = 68 * 1 / ( 10 * 4 ) = 68 / ( 10 * 4 ) = 68 / 40 = 34 / 20 = 17 / 10 3 , 6 / 8 = 3 целых 6 / 10 / 8 = ( 3 * 10 + 6 ) / 10 / 8 = ( 30 + 6 ) / 10 * ( 1 / 8 ) = 36 / 10 * ( 1 / 8 ) = ( 36 * 1 ) / 80 = 36 / 80 = 18 / 40 = 9 / 20 0,028 / 70 = 28 / 1000 / 7 0 = 28 / 1000 * ( 1 / 70 ) = 28 * 1 / ( 1000 * 70 ) = 28 / 70000 = 14 / 35000 = 7 / 1750010 , 5 / 30 = 10 целых 5 / 10 / 30 = ( 105 / 10 ) * ( 1 / 30 ) = 105 / 300