D

\(234\times1125-234-124\times234\\=234\times(1125-1-124)\\=234\times(1124-124)\\=234\times1000\\=234000\)

a: =234x(45+54+1)

=234x100

=23400

b: =(8x125)x(50x20)

=1000x1000

=1000000

a = 243x(45+54+1)

=243 x 100

=24300

b = (20 x 50 ) x (8x125)

=1000x1000

=1000000

a) 234 x 45 + 54 x 234 + 234

= 234 x (45+54+1) = 234 x 100 = 23400

b) 50 x 8 x 125 x 20 = (50 x 20) x (8 x 125)

= 1000 x 1000 = 1000000

a: =1250:25=50

b: =234(45+55)+234=23400+234=23634

c: =1000x1000=1000000

\(234\times\left(x+5.6\right)=2340\)

\(x+5,6=2340:234\)

\(x=10-5,6\)

\(x=4,4\)

\(234\times x+234\times5,6=234\times10\)
\(234\times\left(x+5,6\right)=2340\)
\(x+5,6=2340:234\)
\(x+5,6=10\)
\(x=10-5,6\)
\(x=4,4\)

\(234\times x+234\times5,6=234\times10\)

\(234\times x+1310,4=2340\)

\(234\times x=2340-1310,4\)

\(234\times x=1029,6\)

\(x=1029,6:234\)

\(x=4,4\)

567 x 234 - 234 x 542 + 234

= 234 x ( 567 - 542 + 1)

= 234 x 26

= 6084

567x234-234x542+234=234x(567-542+1)=234x26=6084

Ta có: 567 x 234 - 234 x 542 + 234 =  567 x 234 - 234 x 542 + 234 x 1

                                                    = 234 x (567 - 542 + 1)

                                                    = 234 x 26

                                                     = 6084

A. 234 x ( 1257 – 257 )   =  234 x 1257 - 234 x 257

B. 135 x 80 + 20 x 135    =   135 x ( 80 + 20 )

băng 0 bn nhá

=(1+2+...+100)*(1125-1125)*(234*12+234*88)

=(1+2+...+100)*0*(234*12+234*88)

=0

Xin lỗi nhé , Yami

=2323

`234 xx 1257 - 234 xx 257`

`= 234 xx (1257 -257)`

`= 234 xx 1000`

`= 234000`

`312 xx 415 + 312 xx 574 + 312`

`=312 xx 415 + 312 xx 574 + 312xx1`

`=312 xx(415 + 574+1)`

`= 312 xx 1000`

`= 312000`