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

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

132*99 + 132 = 132 * 100 = 13200

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

-5/2×(2/11+9/11)×(-5/7+15/7)

-5/2×1×10/7

-5/2×10/7

25/7

nhanh gọn lẹ :))

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 !!!

=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

a: 45+432+155+168

=45+155+432+168

=200+600

=800

b: \(5\cdot135-5\cdot35+175\)

\(=5\cdot\left(135-35\right)+175\)

\(=5\cdot100+175\)

=500+175

=675

c: \(129\cdot172-73\cdot129+129\)

\(=129\cdot\left(172-73+1\right)\)

\(=129\cdot100=12900\)

d: \(29\cdot73+110\cdot71+37\cdot29\)

\(=29\cdot\left(73+37\right)+110\cdot71\)

\(=29\cdot110+71\cdot110=110\cdot100=11000\)

e: \(12:\left\lbrace390:\left\lbrack500-\left(125+35\cdot7\right)\right\rbrack\right\rbrace\)

\(=12:\left\lbrace390:\left\lbrack500-\left(125+245\right)\right\rbrack\right\rbrace\)

\(=12:\left\lbrace390:\left\lbrack500-370\right\rbrack\right\rbrace=12:\left\lbrace\frac{390}{130}\right\rbrace=12:3=4\)

f: \(375:\left\lbrace32-\left\lbrack4+\left(5\cdot9-42\right)\right\rbrack\right\rbrace-14\)

\(=375:\left\lbrace32-\left\lbrack4+45-42\right\rbrack\right\rbrace-14=375:\left\lbrace32-7\right\rbrace-14\)

=375:25-14

=15-14

=1

a, 47.69-31(-47)

=47(69+31)

=47.100

4700

b,(-14)(-25)+25(-11)

=14.25+25(-11)

=25(14-11)

=25.3=75

(25⁹.11 - 25².25⁷) : 25⁸

= (25⁹.11 - 25⁹) : 25⁸

= 25⁹.(11 - 1) : 25⁸

= 25.10

= 250

\(\left(25^9.11-25^2.25^7\right):28\)

\(=\left(25^9.11-25^9\right):25^8\)

\(=\left[25^9\left(11-1\right)\right]:25^8\)

\(=\left(25^9.10\right):25^8\)

\(=25^9:25^8.10\)

\(=25.10\)

\(=250\)