It is 13.
It is: 1/2 times 26 = 13
26
negative 104
136.5 / 10.5 = 13
9 x 3/2 = 27/2 = 13 and a half
negative 3 times
-26
13 x 1/2= 13/1 x 1/2= 13/2= 6.5
-1/3 x -12/13 = + 4/13
-52 (Negative X Negative = Positive) (Negative X Positive = Negative)
-9 and -13 -9 times -13 = 117 -9 plus -13 = -22