( 2014 x 2015 - 2016 ) : ( 2012 + 2013 x 2014 )

= ( 4058210 - 2016 ) : ( 2012 + 4054182 )

= 4056194 : 4056194

= 1

﴾ 2014 x 2015 ‐ 2016 ﴿ : ﴾ 2012 + 2013 x 2014 ﴿

= ﴾ 4058210 ‐ 2016 ﴿ : ﴾ 2012 + 4054182 ﴿

= 4056194 : 4056194

= 1

 ( 2014 x 2015 - 2016 ) : (2012 + 2013 x 2014 )

= ( 2014 x ( 2013 + 2 ) - 2016 ) : ( 2012 + 2013 x 2014 )

= ( 2014 x 2013 + 2014 x 2 - 2016 ) : ( 2012 + 2013 x 2014 )

= ( 2014 x 2 - 2016 ) : 2012

=  ( 4028 - 2016 ) : 2012 

=      2012       : 2012

= 1 

đó là phép tính của lớp 1 đó hả

(2011/2012+2012/2013+2013/2014+...+3026/3027) x (1/5-2/3:3/10)

= (2011/2012+2012/2013+2013/2014+...+3026/3027) x (1/5-2/10)

= (2011/2012+2012/2013+2013/2014+...+3026/3027) x (1/5-1/5)

= (2011/2012+2012/2013+2013/2014+...+3026/3027) x 0

= 0

LÀ 0

Tk mình nhé dù mình ko âm điểm.

thanks

Every one

là 0 đó 

bài này mình học rồi

    2014 : 25 - 2012 : 25

=  (2014 - 2012) : 25

=   2  :  25

=     0,08

( 2014- 2012) :25

= 2: 25

= 0,08

=2012x(1+1+1+1+7-1)

=2012.10

=20120

học tốt em nhé

( 2013 x 2014 + 2014 x 2015 + 2015 x 2016) x ( 1 + 1/3 - 4/3)

=( 2013 x 2014 + 2014 x 2015 + 2015 x 2016) x ( 4/3 - 4/3)

=( 2013 x 2014 + 2014 x 2015 + 2015 x 2016) x 0

=0

Ta có: \(\left(2013\cdot2014+2014\cdot2015+2015\cdot2016\right)\left(1+\dfrac{1}{3}-\dfrac{4}{3}\right)\)

\(=\left(2013\cdot2014+2014\cdot2015+2015\cdot2016\right)\left(\dfrac{3}{3}+\dfrac{1}{3}-\dfrac{4}{3}\right)\)

=0

a, \(\dfrac{12}{17}\) x \(\dfrac{21}{63}\) x \(\dfrac{51}{9}\)

=  \(\dfrac{3\times4}{17}\)  x \(\dfrac{3\times7}{9\times7}\) x \(\dfrac{17\times3}{9}\)

= \(\dfrac{4}{3}\)