Question

7/19.8/11+7/19=

Answer 1

=7/19.8/11

=56/209

Answer 2

\(\frac{7}{19}.\frac{8}{11}+\frac{7}{19}\)

\(=\frac{7}{19}.\frac{8}{11}+\frac{7}{19}.1\)

\(=\frac{7}{19}.\left(\frac{8}{11}+1\right)\)

\(=\frac{7}{19}.\frac{19}{11}\)

\(=\frac{7}{11}\)

Answer 3

\(=\frac{56}{209}+\frac{7}{19}=\frac{7}{11}\)

Answer 4

  7/19 . 8/11 + 7/19

= 7/19 . ( 8/11 + 1)

= 7/19 . ( 8/11 + 11/11)

= 7/19 . 19/11

= 7/11

                     #Cothanhkhe

Answer 5

7/19.8/11+7/19

=7/19.(8/11+1)

=7/19.19/11

=7/11

có đúng ko nà