1/2 - 4 = -3.5
-5/11 - (-5/11) = -5/11 + 5/11 = 0
-5 - (-2/1/3) = -5 + 6 = 1
-8 - (-1/7) = -8 + 1/7 = -57/7
1/6 - 3 = 1/6 - 18/6 = -17/6
-5/12 - (-4) = -5/12 + 48/12 = 43/12
1/2 - 4 = -3.5
-5/11 - (-5/11) = -5/11 + 5/11 = 0
-5 - (-2/1/3) = -5 + 6 = 1
-8 - (-1/7) = -8 + 1/7 = -57/7
1/6 - 3 = 1/6 - 18/6 = -17/6
-5/12 - (-4) = -5/12 + 48/12 = 43/12