Cần gấp ^^

\(\Leftrightarrow\left(\dfrac{x-11}{111}+1\right)+\left(\dfrac{x-12}{112}+1\right)=\left(\dfrac{x-23}{123}+1\right)+\left(\dfrac{x-24}{124}+1\right)\)

=>x+100=0

=>x=-100

a: =>\(\left(\dfrac{x+1}{99}+1\right)+\left(\dfrac{x+4}{96}+1\right)+\left(\dfrac{x+8}{92}+1\right)+\left(\dfrac{x+3}{97}+1\right)=0\)

=>x+100=0

=>x=-100

b: =>(x-11/111+1)+(x-12/112+1)=(x-23/123+1)+(x-24/124+1)

=>x+100=0

=>x=-100

679+679x123-679x24

=679x1+679x123+679x24

=679x(1+123-24)

=679x100

=67900

245x327-245x18-9x245

=245x(327-18-9)

=245x300

=73500

679 +679 x 123 - 679 x 24

= 679 x ( 1 + 123 - 24 ) 

= 679 x 100

= 67900

245 x 327 - 245 x 18 - 9 x 245

= 245 x ( 327 - 18 - 9 ) 

= 245 x 300

= 73500

679+679x123-679x24

=679x1+679x123-679x24

=679x(1+123-24)

=679x100

=67900

245x327-245x18-9x245

=245x(327-18-9)

=245x300

=73500

a)

\(a=2136\times2136=2136\times\left(2134+2\right)=2136\times2134+2136\times2\)

\(b=2134\times2138=2134\times\left(2136+2\right)=2134\times2136+2134\times2\)

Vì \(2136\times2>2134\times2\)     

=> \(a>b\)

b)

=> \(a=b\)\(b=123\times246+77-=123\times\left(245+1\right)+77=123\times245+123+77=123\times245+200\)\(a=245\times124-45=245\times\left(123+1\right)-45=245\times123+245-45=245\times123+200\)

a) 36 x 532 + 63 x 532 + 532

= 532 x (36 + 63 + 1)

= 532 x 100

= 53200

b) 679 + 679 x 123 - 679 x 24

= 679 x (1 + 123 - 124)

= 679 x 0

= 0

c) 245 x 327 - 245 x 18 - 9 x 245

= 245 x (327 - 18 - 9)

= 245 x 300

= 73500

a)

\(36\times532+63\times532+532\)

\(=36\times532+63\times532+532\times1\)

\(=532\times\left(36+63+1\right)\)

\(=532\times100\)

\(=53200\)

b)

\(679+679\times123-679\times24\)

\(=679\times1+679\times123-679\times24\)

\(=679\times\left(1+123-24\right)\)

\(=679\times100\)

\(=67900\)

c)

\(245\times327-245\times18-9\times245\)

\(=245\times\left(327-18-9\right)\)

\(=245\times300\)

\(=73500\)

a)

   36 x 532 + 63 x 532 + 532

= 36 x 532 + 63 x 532 + 532 x 1

= ( 36 + 63 + 1 ) x 532

=              100 x 532

=                 53200

b)

   679 + 679 x 123 - 679 x 24

= 679 x 1 + 679 x 123 - 679 x 24

= 679 x ( 1 + 123 - 24 )

=  679 x 100

=    67900

c)

  245 x 327 - 245 x 18 - 9 x 245 

= 245 x ( 327 - 18 - 9 )

=  245 x 300

=        73500 

A = 123 . 123

A = 15129.

B = 121 . 124

B = 15004.

=> 15129 >15004.

Vậy: A > B.

Ta có :

\(121.124=\left(123-2\right)\left(123+2\right)=123^2-2^2< 123^2\)

\(\Rightarrow A< B\)

Đoan cuối là A>B nhs

Hướng dẫn giải:

36 x 43 = 1548

123 x 25 = 3075

245 x 34 = 8330

8188:215

x + 123 = 985

          x = 985 - 123

          x = 862

x - 124 = 857

        x = 857 + 124

        x = 981       

x+123=985 =>x=985-123 =>x=862

x-124=857 =>x=857+124 =>x=981

x + 123 = 985

               x = 985 - 123

               x = 862

x - 124 = 857

               x = 857 + 124

               x = 981