9-12= 13-27= -47-62= -91+20= -72+99= быстрее удачи

-9 - 12 = - ( 9 + 12 ) = -21.
13 - 27 = - ( 27 - 13 ) = -14.
-47 - 62 = - ( 47 + 62 ) = -109.
-91 + 20 = - ( 91 - 20 ) = -71.
-72 + 99 = 99 - 72 = 27.

Удачи

-9-12= -21
13-27= -14
-47-62= -109
-91+20= -71
-72+99=27