1/

25x12x30x4

= (25x4)x(12x30)

=100x3600
=360 000

2/

23+23x2+23x3+23x4

=23x1+23x2+23x3+23x4

=23x(1+2+3+4)

=23x10

=230

3/

 248x2005 - 2005x148

=(248-148)x2005

=100x2005

=200500

1/

25x12x30x4

= (25x4)x(12x30)

=100x3600
=360 000

2/

23+23x2+23x3+23x4

=23x1+23x2+23x3+23x4

=23x(1+2+3+4)

=23x10

=230

3/

 248x2005 - 2005x148

=(248-148)x2005

=100x2005

=200500

1/

25x12x30x4

= (25x4)x(12x30)

=100x3600
=360 000

2/

23+23x2+23x3+23x4

=23x1+23x2+23x3+23x4

=23x(1+2+3+4)

=23x10

=230

3/

 248x2005 - 2005x148

=(248-148)x2005

=100x2005

=200500

\(3263\times4+3263\times5+3263\)

\(=3263\times\left(4+5+1\right)\)

\(=3263\times10\)

\(=32630\)

Ủng hộ mk nhé

3263x4+3263x5+3263

=3263x(4+5+1)

=3263x10

=32630

3263 x 4 + 3263 x 5 + 3263

= 3263 x ( 4 + 5 + 1 )

= 3263 x 10

= 32630

Ai thấy đúng thì tk . chúc bn học giỏi

=( 25x4)x(12x3)

=100x36

=3600

246 x 2005 - 2005 x 148 = 2005 x ( 246 - 148 )

                                     = 2005 x 98 

                                     = 196490

a) \(\frac{1.2.3.4}{5.6.7.8}=\frac{1.2.3.4}{5.2.3.7.2.4}=\frac{1}{70}\)

b) 23 + 23.2 + 23.3 + 23.4

23.( 1+2+3+4)

23.10

230

tinh tung cau co ma

2005x(246-148)

= 2005x   98

=    196490

196490 nha

con Ngô Hoàng Giang 5 điểm

25x12x30x4 = (25x4) x (12x30)

                   = 100 x 360

                   =36000

=(25.4).(12.30)     =100.360=36000   ;nho **** cho minh nhe !

36000

25 x 12 x 30 x 4 = (25 x 4) x (12 x 30)
                        = 100 x 360

                        = 36000

25 x 12 x 30 x 4 = ( 25 x 4 x 10 ) x 12 x 3

              = 1000 x 36 

              = 36 000

Ta có : 25x12x30x4 = (25 x 4) x (30 x 12) 

                              = 100 x 360

                              = 3600