Решите 13+(-2)= -4+(-8)= 5+(-9)= -12+(-5)= 13-(-2) 5-(-9) -4-(-8) -12-(-5) 43+(-12) -5+(79) -52-(-13) -11-51
11 -12 -4 -17 15 14 4 -7 31 74 -39 -62