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

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

= \(\dfrac{4}{3}\)

2010 + 2010 + 2010 + 2010 - 2010 x 4

= (2010 x 4) - (2010 x 4)

= 8040 - 8040

=  0

(tick giúp mình nha)

2010+2010+2010+2010-2010x4

=2010x1+2010x1+2010x1+2010x1-2010x4

=2010x(1+1+1+1-4)

=2010x0

=0

Ai trả lời giúp đi mòa plz

=2010 x ( 3+6+1)                                                                     

=2010 x 10                                                                                                     

=20100

  2010 x 3 + 2010 x 6 + 2010

=  2010 x ( 3 + 6 + 1 )

=  2010 x 10

= 20100

N=\(\frac{2010+2011}{2011+2012}=\frac{2010}{2011+2012}+\frac{2011}{2011+2012}\)

M=\(\frac{2010}{2011}+\frac{2011}{2012}\)

ta có \(\frac{2010}{2011+2012}< \frac{2010}{2011}\)

          \(\frac{2011}{2011+2012}< \frac{2011}{2012}\)

-> N<M

40258050 nhớ k nha

\(2012+20122012+2013+20132013\)

\(=\left(2012+2013\right)+\left(20122012+20132013\right)\)

\(=4035+40354035\)

\(=40358070\)

Chúc bạn học tốt!!!

Lời giải:

$2010\times 4+1005\times 190+2019$

$=1005\times 2\times 4+1005\times 190+2019$

$=1005\times 8+1005\times 190+2019$

$=1005\times (8+190)+2019=1005\times 198+2019=201009$

= 1000 x 2010

= 2010000

25.2010.40

=(25.40).2010

=1000.2010

=2010000

=2010x1000=2010000