Question

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

 

Answer 1

a/b là phân số nha

Answer 2

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

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

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

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

\(=6\)

Answer 3

( 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#