100:(250:(325-(4.5³-2².50)))

=100:(250:(5².13-(2².5³-2³.5²)))

=100:(250:(5².13-2².5².(5-2)))

=100:(250:(5².13-5².2².3))

=100:(250:(5².(13-12)))

=100:(250:25)

=100:10

=10

Đúng thì tk nha (bài kia t viết hơi chậm nên để 2 bạn kia làm lun :v)

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

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

\(=100:250\cdot150\)

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

\(=60\)

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

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

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

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

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

\(=280\)

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

100: { 250: [  450 - ( 500 - 100 ) ]}

100: {250:[ 450 - 400]

100: { 250 : 50 }

100: 5 = 20

\(x+200-\left(-100\right)-150=250+2.50\)

          \(x+200+100-150=250+100\)

                                     \(x+150=350\)

                                                   \(x=350-150\)

                                                   \(x=200\)

x+200-(-100)-150=250+2.50

x+200+100-150=250+100

x+200+100-150=350

x+200+100     = 500

x+200            = 400

x                  =200

vậy x=200.

x+200-(-100)-150=250+2.50

x+200-(-100)-150=250+100

x+200-(-100)-150=350

x-(-100)-150=350-200

x-(-100)-150=150

x-(-100)=150+150

x-(-100)=300

x=300+(-100)

x=200

\(=100:\left\{250\left[450-\left(4\cdot125-4\cdot25\right)\right]\right\}\\ =100:\left[250\left(450-400\right)\right]\\ =100:\left(250\cdot50\right)=100:12500=12,5\)

100 : { 250 [ 450 - ( 4.5^3 - 2^2 .25) ]} = 12,5

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

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

=100:{250:50}

=100:5

=20

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:{250:[450-(4.5³-2².25)}]

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

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

=100:{250:50}

=100:5

=20

ai giúp mình với 

các góc nhọn,tù,vuông có bao nhiêu độ

minhf