\(a,3^3+3^2-\left(2^7:2^5+7^8:7^7\right)=27+9-\left(2^2+7\right)=36-11=25\)

\(b,27.77+27.27-27=27\left(77+27-1\right)=27.103=2781\)

\(c,52:\left(43-30\right)+144-16=52:13+128=4+128=132\)

\(f,3^2.101-3^2.101^0=3^2\left(101-101^0\right)=9\left(101-1\right)=9.100=900\)

a.=27+9-(2^2+7^1)                                                 =36-(4+7)                                                               =36-11                                                                   =25

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

viết mỏi tay k ai tk cho:V

100:{250:[450-(4.5³-2².25)]}

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

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

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

=100:{250:50}

=100:5=20

100:{250:[450-(4.5³-2².25)]}

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

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

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

=100:{250:50}

=100:5=20

a,714+382+286+318

\(=\left(714+286\right)+\left(382+318\right)\)

\(=1000+700\)

= \(1700\)

b,18.73+15.18+12.18

\(=18.\left(73+15+12\right)\)

\(=18.100\)

\(=1800\)

c,(37+63) : {250:[450-(4.5^3-2^2.25)]}

\(=100:\left\{250:\left[450-\left(2^2.125-2^2.25\right)\right]\right\}\)

\(=100:\left\{250:\left[450-\left(2^2.\left(125-25\right)\right)\right]\right\}\)

\(=100:\left\{250:\left[450-400\right]\right\}\)

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

\(=100:5\\ =20\)

CHÚC BANJ HỌC TỐT!!

a) 714+382+286+318

=(714+286)+(382+318)

=1000+700

=1700

b) 18.73+15.18+12.18

=18.(73+15+12)

=18.100

=1800

c) (37+63):{250:[450-(4.5^3-2^2.25)]}

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

=100:{250:[450-4.(125-25)]}

=100:{250:[450-4.100]}

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

=100:{250:50}

=100:5

=20

-Chúc bạn học tốt-

=100;(250;[450-(2².5²-2².5²)])

=100;(250;450)=100;(5/9)=180

nhớ **** nha

Là :

= 100 : {300 : [450 - (500-200)]}

= 100 : {300 : [450-300]}

= 100 : {300 : 150}

= 100 : 2

= 50

cảm ơn các bạn nhiều nha

x là dấu .

\(a,245-96+6\)

\(=155\)

\(b,=23\times\left(65+35\right)\)- 360

\(=23\times100-360\)

\(=1940\)

\(c,3^3+3^2-\left(2^2+7\right)\)

\(3^3+3^2-\left(4+7\right)\)

=\(3^3+3^2-11\)

=\(27+9-11\)

a) \(26+173+74+27\)

\(=\left(26+74\right)+\left(173+27\right)\)

\(=100+200\)

\(=300\)

b) \(75\cdot37+89\cdot46+75\cdot52-89\cdot21\)

\(=75\cdot\left(37+52\right)+89\cdot\left(46-21\right)\)

\(=75\cdot89+89\cdot25\)

\(=89\cdot\left(75+25\right)\)

\(=89\cdot100\)

\(=8900\)

c) \(2^7:2^2+5^4:5^3\cdot2^4-3\cdot2^5\)

\(=2^{7-2}+5^{4-3}\cdot2^4-3\cdot2^5\)

\(=2^5+5\cdot2^4-3\cdot2^5\)

\(=2^4\cdot\left(2+5-3\cdot2\right)\)

\(=2^4\cdot\left(7-6\right)\)

\(=2^4\)

\(=16\)

d) \(100:\left\{250:\left[450-\left(4\cdot5^3-2^2\cdot25\right)\right]\right\}\)

\(=100:\left\{250:\left[450-\left(4\cdot5^3-4\cdot5^2\right)\right]\right\}\)

\(=100:\left[250:\left(450-4\cdot5^2\cdot4\right)\right]\)

\(=100:\left[250:\left(450-400\right)\right]\)

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

\(=100:5\)

\(=20\)