a) -3/4 - (-5/6) = -3/4 + 5/6 = -9/12 + 10/12 = 1/12б) 25 - 32 = -7в) 3 5/6 - 4 3/8 = 3 10/12 - 4 6/8 = 3 5/6 - 4 3/8 = -3/8г) -3 - 4/9 = -27/9 - 4/9 = -31/9д) -5.5 - 2.8 = -8.3е) -7 8/9 - (-9 1/6) = -7 - 8/9 + 9 1/6 = -7 + 9 + 1 - 8/9 - 1/6 = 3 1/9 + 1/3 = 10/3 = 3 1/3
a) -3/4 - (-5/6) = -3/4 + 5/6 = -9/12 + 10/12 = 1/12
б) 25 - 32 = -7
в) 3 5/6 - 4 3/8 = 3 10/12 - 4 6/8 = 3 5/6 - 4 3/8 = -3/8
г) -3 - 4/9 = -27/9 - 4/9 = -31/9
д) -5.5 - 2.8 = -8.3
е) -7 8/9 - (-9 1/6) = -7 - 8/9 + 9 1/6 = -7 + 9 + 1 - 8/9 - 1/6 = 3 1/9 + 1/3 = 10/3 = 3 1/3