a) [(-10)+6]:[(-4)×(-2)-10] =
=-4:(8-10)
=-4:(-2)
=2
b) 9×10:[(-3)+(-10)-2]=
=9×10:(-15)
=90:(-15)
=-6
c) [9:(-9)+5]×[(-7)-3]=
=(-1+5)×(-10)
=4×(-10)
=-40
d) [7×3-(-4)]:[(-5)+10]=
=(21-4):5
=17/5
e) (-6)×[5-8:(-9)+10]=
=-6×(5+8/9+10) (amplificam 5 si 10 cu 9)
=-6×(45/9+8/9+90/9)
=-6×143/9
=-286/3