а) 5 2/15 + 3 5/12 = 5 + 3 + 2/15 + 5/12 = 8 + 2/15 + 5/12 = 8 + 8/60 + 25/60 = 8 + 33/60 = 8 33/60 = 8 11/20
б) 9 4/21 - 4 11/14 = 9 - 4 + 4/21 - 11/14 = 5 + 4/21 - 11/14 = 5 + 8/42 - 33/42 = 5 - 25/42 = 5 17/42
в) 5 13/35 + 2 13/14 = 5 + 2 + 13/35 + 13/14 = 7 + 13/35 + 13/14 = 7 + 26/70 + 65/70 = 7 + 91/70 = 7 21/70 = 7 3/10
г) 5 5/33 - 5 7/22 = 5 - 4 + 5/33 - 7/22 = 1 + 5/33 - 7/22 = 1 + 10/66 - 21/66 = 1 - 11/66 = 1 55/66
а) 5 2/15 + 3 5/12 = 5 + 3 + 2/15 + 5/12 = 8 + 2/15 + 5/12 = 8 + 8/60 + 25/60 = 8 + 33/60 = 8 33/60 = 8 11/20
б) 9 4/21 - 4 11/14 = 9 - 4 + 4/21 - 11/14 = 5 + 4/21 - 11/14 = 5 + 8/42 - 33/42 = 5 - 25/42 = 5 17/42
в) 5 13/35 + 2 13/14 = 5 + 2 + 13/35 + 13/14 = 7 + 13/35 + 13/14 = 7 + 26/70 + 65/70 = 7 + 91/70 = 7 21/70 = 7 3/10
г) 5 5/33 - 5 7/22 = 5 - 4 + 5/33 - 7/22 = 1 + 5/33 - 7/22 = 1 + 10/66 - 21/66 = 1 - 11/66 = 1 55/66