11. a) -8+[-2+3×(-2+16)]=
-8+(-2+3×14)=
-8+(-2+42)=-8+40=-32
b) 14-9:9+1=14-1+1=14-0=14
d) -45-[3-9×(5-1)]=
-45-(3-9×4)=
-45-(3-36)=-45+33=-12
12. a) (9×9×81):2187=
81×81:2187=
6561:2187=3
c) (-4-6):[49+(-12×-4)]=
-10:(49+48)=
-10:97=-0,10
d) -1000×(-135954-11934+148122)=
-1000×(-147888+148122)=
-1000×234=-234000
atat am stiut. succes!
