Chúc bạn học tốt nha!!!

a/ = 113 x ( 54 + 45 + 1 ) = 113 x 100 = 11300

b/ = 47 x  ( 54 - 53 ) - 20 - 27 = 47 - 20 - 27 = 0

c/ = 145 x  ( 99 + 1 ) - 143  x  ( 101 - 1 ) = 145 x 100 - 143 x 100 = 100 x ( 145 - 143 ) = 100 x 2 = 200

d/ = 1002 x 9 - 2 x 9 = 9 x ( 1002 - 2 ) = 9 x 1000 = 9000

e/ = 24 x 427 + 24 x 573 = 24 x ( 427 + 573 ) = 24 x 1000 = 24000

f/ Sửa đề bài là :

2008 x 867 + 2008 x 133 = 2008 x ( 867 + 133 ) = 2008 x 1000 = 2008000 

2008000

c ) 815 - 23 - 77 + 185 

= ( 815 + 185 ) - ( 23 + 77 )

= 1000 - 100 = 900

m ) 8 x 427 x 3 + 6 x 573 x 4

= 24 x 427 + 24 x 573

= 24 x ( 427 + 573 ) 

= 24 x 1000

= 24000

g ) 52 - 42 + 37 + 28 - 38 + 63

= ( 52 + 28 ) - ( 42 + 38 ) + ( 37 + 63 )

= 80 - 80 + 100

= 0 + 100

= 100

h ) 35 x 18 - 9 x 70 + 100

= 7 x 5 x 9 x 2 - 9 x 7 x 5 x 2 + 100

= 0 + 100

= 100

n ) 2008 x 867 + 2009 x 133

= 2008 x 867 + ( 2008 + 1 ) x 133

= 2008 x 867 + 2008 x 133 + 133

= 2008 x ( 867 + 133 ) + 133

= 2008 x 1000 + 133

= 2008000 + 133

= 2008133

i ) 326 x 78 + 327 x 22

= 326 x 78 + ( 326 + 1 ) x 22

= 326 x 78 + 326 x 22 + 22

= 326 x ( 78 + 22 )  + 22

= 326 x 100 + 22

= 32600 +22

= 32622

q ) ( 20 + 21 + 22 + 23 + 24 + 25 ) x ( 16 - 2 x 8 ) 

= ( 20 + 21 + 22 + 23 + 24 + 25 ) x ( 16 - 16) 

= ( 20 + 21 + 22 + 23 + 24 + 25 ) x 0

= 0

thank bạn

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

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

$=24\times (427+563)$

$=24\times 1000$

$=24000$

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

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

$=24\times (427+563)$

$=24\times 1000$

$=24000$

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

bn phai kb mik mi tra loi

a,2009x867+2009x133=2009x(867+133)=2009x1000=2009000

b,có vẻ sai đề.

Tính giá trị biểu thức sau bằng cách thuân tiện nhất 

a,2009 x 867 + 2009 x 133

= 2009 x ( 867 + 133 )

= 2009 x 1000

= 2009000

b ,2008 x 867 + 2009 x 133

= 2008 × 867 + (2008 + 1) × 133                      

= 2008 × 867 + 2008 × 133 + 133                    

= 2008 × (867 + 133) + 133                               

= 2008 × 1000 + 133                                          

= 2008000 + 133                                              

= 2008133

`@` `\text {Ans}`

`\downarrow`

`a,`

\(\text{326 x 728 + 327 x 272}\)

`= 326 \times 728 + 326 \times 272 + 272`

`= 326 \times (728 + 272) + 272`

`= 326 \times 1000 + 272`

`= 362000 + 272`

`= 362272`

`b,`

\(\text{2008 x 867 + 2009 x 133}\)

`= 2008 \times 867 + 2008 \times 133 + 133`

`= 2008 \times (867 + 133) + 133`

`= 2008 \times 1000 + 133`

`= 2008000 + 133`

`= 2008133`

`c,`

\(\text{1235 x 6789 x (630 - 315 x 2 )}\)

`= 1235 \times 6789 \times (630 - 630)`

`= 1235 \times 6789 \times 0`

`= 0`

`d,`

\((m \div 1 - m \times 1 ) \div ( m \times 2008 + m + 2008)\)

`= (m - m) \div (m \times 2008 + m + 2008)`

`= 0 \div (m \times 2008 + m + 2008)`

`= 0`

a: =326*728+326*272+272

=326000+272

=326272

c: \(=1235\cdot6789\cdot\left(630-630\right)=0\)

d: \(=\left(m-m\right):\left(20009m+2008\right)=0\)

= 24 x 427 + 24 x 573

= 24 x (427 + 573)

= 24 x 1000

= 24000

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

TICK CHO MÌNH NHA

Giải:

 326 x 728 + 327 x 272

= 326 x 728 + 326 x 272 + 272

= 326 x ( 728 +272 ) +272

= 326 x 1000 + 272

= 326 000 +272

= 326 272

TICK CHO MÌNH NHA

Giải:

 2008 x 867 +2009 x 133

= 2008 x 867 + 2008 x 133 +133

= 2008 x ( 867 + 133) +133

= 2008 x 1000 +133

= 2 008 000 + 133

= 2 008 133

a) Ta có: \(326\cdot728+327\cdot272\)

\(=326\cdot728+326\cdot272+272\)

\(=32600+272\)

\(=32872\)

b) Ta có: \(2008\cdot867+2009\cdot133\)

\(=2008\cdot867+2008\cdot133+133\)

\(=2008000+133\)

\(=2008133\)

c) Ta có: \(1235\cdot6789\cdot\left(630-315\cdot2\right)\)

\(=1235\cdot6789\cdot0\)

=0

326 x 728+ 327 × 272  =

237328+88944=  326272

2008 ×867+ 2009× 133 =

1740936+267197=2008133

nhớ k minh nha

a, 326 x 728 + 327 x 272

= ( 326 + 1 ) x 728 + 327 x 272

= 327 x 728 + 327 x 272 

= 327 x ( 728 + 272 ) 

= 327 x 1000

= 327000

b, 2008 x 867 + 2009 x 133

= ( 2008 + 1 ) x 867 + 2009 x 133

= 2009 x 867 + 2009 x 133

= 2009 x ( 867 + 133 ) 

= 2009 x 1000

= 2009000