Формула -3+5=+(5-3) -100+5= -200+7= -30+40= 40-60= 50-78= 100-200= формула -3-5=-(3+5) )=+a -10-20= -3-7= -12-16= )-3= )+1= -9+(-10)= !

-100+5 = +(5-100)= -95
-200+7 = +(7-200)= -193
-30+40 = +(40-30)=10
40-60= -20
50-78= -28
100-200 = -100

-10-20= -(10+20)= -30
-3-7= -(3+7)= -10
-12-16= -(12+16)= -28
-(-12)-3= -(3-12)= 9
-(-7)+1 = 7+1 = 8
-9+(-10)= -9-10= -(9+10)=-19