Question

A) 11×(-1)+7-[60+(-80):(-2)]+(-6)


B) 5-7×(-2)-[-20:(-2)+6×(-1)-3]+(-5):(-5)

Answer 1

a) =−11+7−[60+(−80):(−2)]+(−6)=

=-11+7-[60+(-80):(-2)]+(-6)=

=−4−[60+(−80):(−2)]+(−6)==-4-[60+(-80):(-2)]+(-6)=

=−4−[60+40]+(−6)==-4-[60+40]+(-6)=

=−4−[100]+(−6)==-4-[100]+(-6)=

=−104+(−6)==-104+(-6)=

=−110

b)=5−(−14)−[−20:(−2)+6⋅(−1)−3]+(−5):(−5)=

=5-(-14)-[-20:(-2)+6⋅(-1)-3]+(-5):(-5)=

=19−[−20:(−2)+6⋅(−1)−3]+(−5):(−5)==19-[-20:(-2)+6⋅(-1)-3]+(-5):(-5)=

=19−[10+6⋅(−1)−3]+(−5):(−5)==19-[10+6⋅(-1)-3]+(-5):(-5)=

=19−[10+(−6)−3]+(−5):(−5)==19-[10+(-6)-3]+(-5):(-5)=

=19−[4−3]+(−5):(−5)==19-[4-3]+(-5):(-5)=

=19−[1]+(−5):(−5)==19-[1]+(-5):(-5)=

=18+(−5):(−5)==18+(-5):(-5)=

=18+1==18+1=

=19

espero ter ajudado

Answer 2

Boa tarde.

$A) 11.(-1)+7-[60+(-80):(-2)]+(-6) = - 11 + 7 - [60 + 40] - 6 = - 11 + 7 - [100] - 6 = - 11 + 7 - 100 - 6 = - 117 + 7 = - 110$

$B) 5-7.(-2)-[-20:(-2)+6.(-1)-3]+(-5):(-5) = 5 + 14 - [10 - 6 - 3] + 1 = 5 + 14 - [10 - 9] + 1 = 5 + 14 - [1] + 1 = 5 + 14 - 1 + 1 = 20 - 1 = 19$

Elimina:

1) - parênteses ( )
2) - colchetes [ ]

Regras dos sinais: 

+ com + = +
- com - = +
- com + = -
+ com - = -

Bons estudos! :-)