-9-12= 13-27= -47-62= -91+20= -72+99= БЫСТРЕЕ ПЖ 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