bằng 1 nhé

\(\frac{2009\times2008-1}{2007\times2009+2008}\)

\(=\) \(\frac{4034071}{4034071}\)

\(=\) \(1\)

=1 nhé

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= \(\frac{1}{1}\)nhé

Đúng 100%! Ai tk mình,mình tk cho ~tth~ xin hết!

Chẳng ai chịu tk hu hu

\(\frac{2009\times2008-1}{2007\times2009+20082}\)

\(=\)\(\frac{4034071}{4034071}\)

\(=\)\(1\)

2/3 x 1/6 x 9/11 

= 1/9 x 9/11

= 1/11

1/11 nhé bn tk mk nhé mk sẽ kb

(2/3x1/6)x9/11

= 1/9x9/11

=1/11

Cách 1

= 625 : 125

= 5

Cách 2

= 625 : 25 :5

= 25 : 5

= 5

Đúng 100%

Đúng 100%

Đúng 100%

625 : (25 x 5)

= 625 : 125

= 5

~~~ ủng hộ tớ nha ~~~

~~~` thank you ~~~ ☺ ..

= 625 : 125 

= 5 

chỉ vậy thôi được ko

96 * 37 - 3 * 26 * 32 - 96

= 96 * 37 - 96  * 26  - 96 * 1

= 96 * ( 37 - 26 - 1 - 1 )

= 96 * 10

= 960

=

96 x 37 - 3 x 26 x 32 - 96

= 3552- 3 x 26 x 32 - 96

= 3552 - 78 x 32 -96

= 3552 - 2496 -96

= 1056 - 96

= 960

ủng hộ nhé

ai k mình mình k lại

96 x 37 - 3 x 26 x 32 - 96

= 96 x 37 - 96 x 26 - 96 x 1

=96 x (27-26- 1)

=96 x 0

=0

2820 +2820+2820+2820-2820x3=2820x1+2820x1+2820x1+2820x1-2820x3=2820x(1+1+1+1-3)=2820x1=2820

25380

2820×4-2820×3

2820×(4-3)

2820×1

2820

\(\frac{2}{3}\times\frac{1}{5}+\frac{3}{10}\times\frac{2}{3}+\frac{4}{6}\times\frac{1}{2}\)

\(=\frac{2}{3}\times\frac{1}{5}+\frac{3}{10}\times\frac{2}{3}+\frac{2}{3}\times\frac{1}{2}\)

\(=\frac{2}{3}\times\left(\frac{1}{5}+\frac{3}{10}+\frac{1}{2}\right)\)

\(=\frac{2}{3}\times\frac{10}{10}\)

\(=\frac{2}{3}\)

45 x 77 + 9 x 22 x 5 + 45

= 45 x 77 + 45 x 22 + 45

= 45 x (77 + 22 + 1)

= 45 x 100

= 4500

k mik nhé

45x22+9x22x5+45=3465+990+45

=4500

\(45x77+9x22x5+45\)

\(=45x77+45x22+45\)

\(=45x\left(77+22+1\right)\)

\(=45x100\)

\(=4500\)

12/13 + 2/7 + 8/13 + 6/13 + 5/7

= ( 2/7 + 5/7 ) + ( 12/13 + 8/13 + 6/13 )

= 1 + 2

= 3

=(12/13+8/13+6/13)+(2/7+5/7)=2+1=3

12/13+2/7+8/13+6/13+5/7

   =(12/13+8/13+6/13)+(2/7+5/7)

   =2+1

   =3