\(a,8\times427\times3+6\times573\times4\)

\(=24\times427+24\times573\)

\(=24\times\left(427+573\right)\)

\(=24\times1000\)

\(=24000\)

\(b,6\times1235\times20-5\times235\times24\)

\(=120\times1235-120\times235\)

\(=120\times\left(1235-235\right)\)

\(=1235\times1000\)

\(=1235000\)

a: =24x427+24x573

=24000

$a,8\times 427\times 3+6\times 573\times 4$

$=24\times 427+24\times 573$

$=24\times \left(427+573\right)$

$=24\times 1000$

$=24000$

$b,6\times 1235\times 20-5\times 235\times 24$

$=120\times 1235-120\times 235$

$=120\times \left(1235-235\right)$

$=1235\times 1000$

$=$

\(8\cdot427\cdot3+6\cdot573+46\cdot1235\cdot20-5\cdot235\cdot24\)

\(=4\cdot2\cdot427\cdot3+6\cdot573+23\cdot2\cdot1235\cdot20-5\cdot235\cdot4\cdot3\cdot2\)

\(=4\cdot427\cdot6+6\cdot573+23\cdot2\cdot247\cdot5\cdot20-20\cdot5\cdot47\cdot3\cdot2\)

\(=6\cdot\left(4\cdot427+573\right)+23\cdot247\cdot200-47\cdot3\cdot200\)

\(=6\cdot\left(1708+573\right)+23\cdot\left(200+47\right)\cdot200-47\cdot3\cdot200\)

\(=6\cdot2281+23\cdot200\cdot200+23\cdot47\cdot200-47\cdot3\cdot200\)

\(=13686+23\cdot40000+20\cdot200\cdot47\)

\(=13686+920000+4000\cdot47\)

\(=13686+920000+188000\)

\(=13686+\left(920000+188000\right)\)

\(=13686+1108000=1121686\)

trời ơi là trời

làm đúng mà dis

mệt quá là mệt

thằng mô dis tui hử khai mau

tui dis hết luôn cho mà coi

a: =24*1000=24000

b: =120*1000=120000

c: =72(135+65):25-140

=72*8-140=436

d: =18(957-354-621):72=-9/2

a, 
8 x 427 x 3 - 6 x 573 x 4
= 24 x 472 - 24 x 573
= 24 x (473 - 573)
b, tương tự
tuy nhiên với đề bài như vậy, k phù hợp với HS lớp 4

427 Ko trừ đc cho 578

$8\times 427\times 3+6\times 563\times 4$

$=24\times 427+24\times 563$

$=24\times (427+563)$

$=24\times 1000$

$=24000$

$8\times 427\times 3+6\times 563\times 4$

$=24\times 427+24\times 563$

$=24\times (427+563)$

$=24\times 1000$

$=24000$

8 x 427 x 3 + 6 x 573 x 4

= (8 x 3) x 427 + 573 x (6 x 4)

= 24 x 427 + 573 x 24

= 24 x (427+573)

= 24 x 1000

= 24 000

 8 x 427 x 3 + 6 x 573 x 4

= 8 x 3 x 427 + 6 x 4 x 573

= 24 x 427 + 24 x 573

= 24 x (427 + 573)

= 24 x 1000

= 24000

 2008 x 867 + 2009 x 133

= 2008 x 867 + 2008 x 133 + 133

= 2008 x (867 + 133) + 133

= 2008 x 1000 + 133

= 2008133

tick cho mink nhé

a) \(8x427x3+6x573x4\)

\(=8x3x427+6x4x573\)

\(=24x427+24x573\)

\(=24x\left(427+573\right)\)

\(=24x1000\)

\(=24000\)

b) \(2008x867+2009x133\)

\(=2008x867+\left(2008+1\right)x133\)

\(=2008x867+2008x133+133\)

\(=2008x\left(867+133\right)+133\)

\(=2008x1000+133\)

\(=2008000+133\)

\(=2008133\)

= 24 x 427 + 24 x 573

= 24 x (427 + 573)

= 24 x 1000

= 24000

\(=\left(8\times3\right)\times427+\left(6\times4\right)\times573\\ =24\times427+24\times573\\ =24\times\left(427+573\right)\\ =24\times1000\\ =24000\)

=3381x3+6x573x4

=10143+6x573x4

=10143+3432x4

=10143+13728

=23871

Lưu ý:Phải làm nhân chia trước,cộng trừ sau.

=24x427+24x573

=24x(427+573)

=24x1000

=24000

đây là cách tính nhanh bạn nha! nếu tính bình thường thì như bạn kia

ko hiểu