(-) и (-)= (+); (-) и (+)= (-)
Вычислите:
1. 4-10/3= 4- 3 1/3= 3 3/3- 3 1/3= 2/3
2. -15+7/2= -15+ 3 1/2= -( 14 2/2- 3 1/2)=
-11 1/2;
В десятичных
-15+ 7/2= -15+ 3,5= -(15-3,5)= -11,5
3. 12-12/-3= 12- 12: (-3)= 12+ 4= 16
4. -18-9/9= -18- 1= -(18+1)=-19
5. -43+8/-5= -43 - 8/5= -43- 1 3/5=
-(43+1 3/5)= - 44 3/5
6. -20-4/-6 = -20 -4:(-6)= -20+ 4/6=
-20+ 2/3= -(20 -2/3)= -(19 3/3- 2/3)=
-19 1/3.