\(=100:\left[250:\left(450-300\right)\right]\)

\(=100:\left(250:150\right)\)

\(=100:250\cdot150\)

\(=\dfrac{20\cdot5\cdot50\cdot3}{5\cdot50}\)

\(=60\)

100:{250:[450-(4.5³-2².25)}]

=100:{250:[450-(500-100)]}

=100:{250:[450-400]}

=100:{250:50}

=100:5

=20

a. 525

b. 

a. -82

b. 15

100:{250:[450-(4.5³-2².25)}]

=100:{250:[450-(500-100)]}

=100:{250:[450-400]}

=100:{250:50}

=100:5

=20

  100:{250:[450-(4.5^3-2^2.25)]}

=100:{250:[450-(4.125-4.25)]}

=100:{250:[450-(500-100)]}

=100:{250:[450-400]}

=100:{250:50}

=100:5

=20

                             ~Chúc học tốt!~

\(100:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)

= \(100:\left\{250:\left[450-\left(2^2.5^3-2^2.5^2\right)\right]\right\}\)

= \(100:\left\{250:\left[450-2^2.5^2\left(5-1\right)\right]\right\}\)

= \(100:\left[250:\left(450-100.4\right)\right]\)

=\(100:\left(250:50\right)\)

= \(100:5\)

= \(20\)

d, \(1000:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)

\(=1000:\left\{250:\left[450-\left(4.125-4.25\right)\right]\right\}\)

\(=1000:\left\{250:\left[450-4.\left(125-25\right)\right]\right\}\)

\(=1000:\left[250:\left(450-400\right)\right]\)

\(=1000:\left(250:50\right)=1000:5=200\)

Chúc bạn học tốt!!!

Ta có : \(1000:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)

\(=1000:\left\{250:\left[450-\left(4.5^3-4.5^2\right)\right]\right\}\)

\(=1000:\left\{250:\left[450-4.5^2\left(5-1\right)\right]\right\}\)

\(=1000:\left[250:\left(450-400\right)\right]\)

\(=1000:\left(250:50\right)\)

\(=1000:5=200\)

Chúc bạn học tốt ^^

\(1000:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)

\(=1000:\left\{250:\left[450-\left(4.125-4.25\right)\right]\right\}\)

\(=1000:\left\{250:\left[450-4.\left(125-25\right)\right]\right\}\)

\(=1000:\left[250:\left(450-400\right)\right]\)

\(=1000:\left(250:50\right)\)

\(1000:5=200\)

1.=545.(65+15-80)

=545.0

=0

2.=100:{250:[450-(4.125-4.25)]}

   =100:{250:[450-4.(125-25)]}

   =100:{250:[450-4.100]}

   =100:{250:50}

   =100:5

   =20

1. 545.65 + 545.15 - 80.445

= 545(65+15)-80.445

= 545.80-80.445

= 80.(545-445)

= 80.100

= 8000

\(100:\left\{250:\left[450-\left(4.5^3-2^5.25\right)\right]\right\}\)

\(=100:\left\{250:\left[450-\left(500-800\right)\right]\right\}\)

\(=100:\left\{250:\left[450+300\right]\right\}\)

\(=100:\left\{250:700\right\}\)

\(=100:\frac{5}{14}\)

\(=280\)

100:{250:[450 - ( 4 . 125 - 4.25 )]}

100: { 250: [  450 - ( 500 - 100 ) ]}

100: {250:[ 450 - 400]

100: { 250 : 50 }

100: 5 = 20