= \(\frac{13}{45}x\left(\frac{15}{26}-1\frac{1}{26}+\frac{11}{26}\right)=\frac{13}{45}x\left(\frac{15}{26}-\frac{27}{26}+\frac{11}{26}\right)=\frac{13}{45}x\left(\frac{27}{26}-\frac{27}{26}\right)=\frac{13}{45}x0=0\)

Online Math là nhất

em yêu Online Math

( 7/20 + 11/15 - 15/12 ) : ( 11/20 - 26/45 )

= -1/6 : -1/36

= -5/36

a/b là phân số nha

\(\left(\frac{7}{20}+\frac{11}{15}-\frac{15}{12}\right):\left(\frac{11}{20}-\frac{26}{45}\right)\)

\(=\left(\frac{21}{60}+\frac{44}{60}-\frac{75}{60}\right):\left(\frac{99}{180}-\frac{104}{180}\right)\)

\(=-\frac{1}{6}:\frac{-1}{36}\)

\(=\frac{-36}{-6}\)

\(=6\)

( 7/20 + 11/15 - 15/12 ) : ( 11/20 - 26/45 ) 

= ( 21/60 + 44/60 - 75/60 ) : ( 99/180 - 104/180 ) 

= -1/6 : -1/36 

= -1/6 x (-36)

= 6

học tốt#

`8: 15=8/15`

`7:3=7/3`

`45:100=45/100=9/20`

`11:26=11/26`

\(8:15=\dfrac{8}{15}\)

\(7:3=\dfrac{7}{3}\)

\(45:100=\dfrac{45}{100}=\dfrac{9}{20}\)

\(11:26=\dfrac{11}{26}\)