Question

Oblicz.
(-100) : [20-(-5)]
1000*[53+(-53)
500:(-10)*[(-15)+(-48)]
(-250)*(-20):[(-125)*(-20)]

Answer 1

(-100) : [20-(-5)]= (-100):(20+5)= -100:25= -4
1000*[53+(-53)=1000*(53-53)=1000*0=0
500:(-10)*[(-15)+(-48)]= -500/10*[(-15)+(-48)]=(-50)*(-15-48)=(-50)*(-63)=
= -(-50*63)= -(-3150)=3150
(-250)*(-20):[(-125)*(-20)]= -(-250*20:[(-125)*(-20)]= -(-5000:(-125*(-20)))=
= -(-5000:(-(-125*20)))= -(-5000:(-(-2500))= -(-5000:2500)= -(-2)=2