Дроби 1)3/4-1/1+1/2, 2) 4/9+5/6-3/4, 3)4/15-2/45+7/9, 4)6/7-1/4+5/14, 6)11/12-1/9+1/4, 5) 7/10+9/14-3/35,
1) 3/4 - 1/1 +1/2 = 3/4 -1 +2/4 =5/4 -1 = 1/4 2) 4/9 +5/6 -3/4 =16/36 +30/36 -37/36 = 9/36 = 1/4 3) 4/15 -2/45 +7/9 = 12/45 -2/45 +35/45 =45/45 = 1 4) 6/7 -1/4 +5/14 = 24/28 -7/28 +10/28 = 27/28 5)7/10 +9/14 -3/35 = 49/70 +45/70 -6/70 = 88/70 =1 18/70 = 1 9/35 6) 11/12 -1/9 +1/4 =33/36 -4/36 +9/36 = 38/36 = 1 2/36 = 1 1/18