а) 4 7/9 + 1 5/6 = 4 + 1 + 7/9 + 5/6 = 5 + 7/9 + 5/6 = 5 + 42/54 + 45/54 = 5 + 87/54 = 5 33/54
б) 3,1 - 9/14 = 3 + 1/10 - 9/14 = 3 + 0.1 - 0.6428571428571429 = 3.1 - 0.6428571428571429 = 2.457142857142857
в) 3 5/7 - 1 11/21 + 2 5/14 = 3 - 1 + 5/7 - 11/21 + 5/7 - 5/7 + 2 = 2 + 2/7 - 11/21 + 2 = 2 + 6/21 - 11/21 + 2 = 2 - 5/21 + 2 = 2 - 0.2380952380952381 + 2 = 3.761904761904762
а) 4 7/9 + 1 5/6 = 4 + 1 + 7/9 + 5/6 = 5 + 7/9 + 5/6 = 5 + 42/54 + 45/54 = 5 + 87/54 = 5 33/54
б) 3,1 - 9/14 = 3 + 1/10 - 9/14 = 3 + 0.1 - 0.6428571428571429 = 3.1 - 0.6428571428571429 = 2.457142857142857
в) 3 5/7 - 1 11/21 + 2 5/14 = 3 - 1 + 5/7 - 11/21 + 5/7 - 5/7 + 2 = 2 + 2/7 - 11/21 + 2 = 2 + 6/21 - 11/21 + 2 = 2 - 5/21 + 2 = 2 - 0.2380952380952381 + 2 = 3.761904761904762