Bài 9:
c.-720+3612:{-151-2.[120+1710:(-15-23)]}
=-720+3612:{-151-2.[120+1710:(-38)]}
=-720+3612:[-151-2.(120-45)]
=-720+3612:(-151-2.75)
=-720+3612:(-151-150)
=-720+3612:(-301)
=-720:(-12)
=60
d.150-1380:{100+12.[180+7.(-12-16)]}
=150-1380:{100+12.[180+7.(-28)]}
=150-1380:{100+12.[180+(-196)]}
=150-1380:[100+12.(-16)]
=150-1380:[100+(-192)]
=150-1380:(-92)
=150+15
=165
e.-130+180:(15-21)²-215
=-130+180:(-6)²-215
=-130+180:36-215
=-130+5-215
=-125-215
=-340
f.-125-352:$(71-73)^{5}$-/-75/
=125-352:$(-2)^{5}$-75
=125-352:(-32)-75
=125+11-75
=136-75
=61.
