Rút gọn phâ số ta dc:

\(=27.\frac{17}{27}+\frac{37}{36}\)

\(=17+\frac{37}{36}=\frac{649}{36}\)

\(=\frac{649}{36}\)nhé bạn

(27x1717171/272727+373737/363636)

=(27x17/27+37/36)

=17+37/26

=18  1/36

=27x(17/27+37/36)=27x17/27+27x37/36= 17+11/4=...

179/4 là đúng

179/4

A, chờ tí nha 

B, rút gọn phân số ta được

= 27 . \(\frac{17}{27}\)- \(\frac{37}{36}\)

= 17 - \(\frac{36}{37}\)= \(\frac{649}{36}\)

tu lam

A,  2005 x 2006 - 1 / 2006 x 2004 + 2005

= \(\frac{4022030}{1}\)- \(\frac{1}{4022029}\)

ta thấy 1 x1 = 1 4022030 - 1 = 4022029 

4022030 x 4022029 = .... : 4022029 = 4022030 

=> \(\frac{4022030-}{4022029\times1}1\)= 1 

27 x \(\left(\frac{171717}{272727}+\frac{373737}{363636}\right)\)

= 27 x \(\left(\frac{17}{27}+\frac{37}{36}\right)\)

= 27 x \(\frac{17}{27}\)+  27 x \(\frac{37}{36}\)

= 17 + 27,75

= 44,75

\(\frac{178}{4}\)bạn nhé

\(27\times\left(\frac{171717}{272727}+\frac{373737}{363636}\right)\)

\(=27\times\left(\frac{17}{27}+\frac{37}{36}\right)\)

\(=27\times\frac{17}{27}+27\times\frac{37}{36}\)

\(=17+\frac{111}{4}\)

\(=\frac{179}{4}\)

> Chúc bạn học tốt <

a) \(\frac{2005\cdot2006-1}{2006\cdot2004+2005}\)

\(=\frac{2004\cdot2006+2006-1}{2006\cdot2004+2005}\)

\(=1\)

b) \(27\left(\frac{171717}{272727}+\frac{373737}{363636}\right)\)

\(=27\left(\frac{17}{27}+\frac{37}{36}\right)\)

\(=27\cdot\frac{17}{27}+27\cdot\frac{37}{36}\)

\(=17+\frac{9\cdot3\cdot37}{9\cdot4}\)

\(=17+27,75=44,75\)

P/s : ko biết câu b có đúng ko nữa

= 18 x ( \(\dfrac{19}{21}\)+\(\dfrac{8}{9}\))+27 x \(\dfrac{17}{27}\)

=18 x \(\dfrac{113}{63}\)+27 x \(\dfrac{17}{27}\)

=\(\dfrac{226}{7}\)+17

=\(\dfrac{345}{7}\)

Chúc bạn học tốt!!

\(\frac{252525}{373737}=\frac{252525:10101}{373737:10101}=\frac{25}{37}\)

\(\frac{272727}{353535}=\frac{272727:10101}{353535:10101}=\frac{27}{35}>\frac{27}{37}>\frac{25}{37}\)

vậy \(\frac{252525}{373737}

\(\frac{252525}{373737}=\frac{25.10101}{37.10101}=\frac{25}{37}=\frac{875}{1295}\)

\(\frac{272727}{353535}=\frac{27.10101}{35.10101}=\frac{27}{35}=\frac{999}{1295}\)

Vì \(\frac{875}{1295}

\(\frac{252525}{373737}=\frac{252525:10101}{373737:10101}=\frac{25}{37};\frac{272727}{353535}=\frac{272727:10101}{353535:10101}=\frac{27}{35}\)

=>25/37<27/35