а) 3 1/3 + 5 7/12 = 3 + 5 + 1/3 + 7/12 = 8 + 1/3 + 7/12 = 8 + 4/12 + 7/12 = 8 + 11/12 = 8 11/12
б) 12 7/15 + 8 5/6 = 12 + 8 + 7/15 + 5/6 = 20 + 7/15 + 50/30 = 20 + 14/30 + 50/30 = 20 + 64/30 = 22 4/30 = 22 2/15
в) 25 - 18 5/6 = 25 - 18 - 5/6 = 7 - 5/6 = 7 - 30/6 = 7 - 5 = 2
г) 10 11/21 - 8 5/14 = 10 - 8 + 11/21 - 5/14 = 2 + 11/21 - 10/14 = 2 + 22/42 - 30/42 = 2 - 8/42 = 2 - 4/21 = 1 17/21
а) 3 1/3 + 5 7/12 = 3 + 5 + 1/3 + 7/12 = 8 + 1/3 + 7/12 = 8 + 4/12 + 7/12 = 8 + 11/12 = 8 11/12
б) 12 7/15 + 8 5/6 = 12 + 8 + 7/15 + 5/6 = 20 + 7/15 + 50/30 = 20 + 14/30 + 50/30 = 20 + 64/30 = 22 4/30 = 22 2/15
в) 25 - 18 5/6 = 25 - 18 - 5/6 = 7 - 5/6 = 7 - 30/6 = 7 - 5 = 2
г) 10 11/21 - 8 5/14 = 10 - 8 + 11/21 - 5/14 = 2 + 11/21 - 10/14 = 2 + 22/42 - 30/42 = 2 - 8/42 = 2 - 4/21 = 1 17/21