\(55-5.\left(20+11\right)=55-5.31=55-155=-100\)

55-5.(20+11)=-100 nha bn

=55-(5.20)-5.11

=55-100-55

=55-55-100

=0-100

=-100

-5/2×(2/11+9/11)×(-5/7+15/7)

-5/2×1×10/7

-5/2×10/7

25/7

=11+(-7).12+(-48):(-4)+25

=11+(-84)+12+25

=-73+12+25

= -61+25

=-36

11 + (- 7) . 12 + (- 48) : (- 4) + 5²

= 11 + (- 84) + 12 + 25

= - 73 + 37

= - 36

132*99 + 132 = 132 * 100 = 13200

168*168-168*58/110 = 168*(168-58)/110 = 168*110/110 = 168

d ) \(\left|-18\right|:\left(14-11^2\right)\)

      \(=18:\left(14-121\right)\)

      \(=18:-107\)

         \(=-\frac{18}{107}\)

e ) \(\left(-25\right)+1945+\left(-75\right)+\left(-1945\right)\)

         \(=\left[\left(-25\right)+\left(-75\right)\right]+\left[1945+\left(-1945\right)\right]\)

          \(=-100+0\)

            \(-100\)

f ) \(217+\left[43+\left(-217\right)+\left(-23\right)\right]\)

  \(=217+43+\left(-217\right)+\left(-23\right)\)

\(=\left[217+\left(-217\right)\right]+\left[43+\left(-23\right)\right]\)

\(=0+20\)

\(=20\)

Chúc bạn học tốt !!!

(158x168-79x58):11:10

=(26 544-4582):11:10

=21 962:11:10

=21 962/11:10

=10981/55

( 158 x 168 - 79 x 58 ) : 11 : 10 = ( 158 x 168 - 79 x 2 x 29) : 11 : 10

= ( 158 x 168 - 158 x 29) : 11 : 10

= 158 x ( 168 - 29 ) : 11 : 10

= 158 x 139 : 11 : 10

= 21962 : 11 : 10

= 10981/55

đáp số = \(\frac{10981}{55}\)