\(\frac{8}{7}+\frac{4}{7}\cdot\left(-\frac{6}{11}\right)-\frac{4}{7}\cdot\frac{5}{11}\)
\(=\frac{8}{7}+\frac{4}{7}\cdot\left(-\frac{6}{11}-\frac{5}{11}\right)\)
\(=\frac{8}{7}-\frac{4}{7}\)
\(=\frac{4}{7}\)
\(\frac{8}{7}+\frac{4}{7}.\left(-\frac{6}{11}\right)-\frac{4}{7}.\frac{5}{11}\)
\(=\frac{8}{7}+\frac{4}{7}.\left(-\frac{6}{11}-\frac{5}{11}\right)\)
\(=\frac{8}{7}-\frac{4}{7}.-1\)
\(=\frac{8}{7}+\frac{4}{7}\)
\(=\frac{12}{7}\)
8 /7 + 4 / 7 . ( -6 ) / 11 - 4 / 7 . 5 / 11
= 8 / 7 + 4 /7 . ( -6 / 11 - 5 / 11 )
= 8 / 7 - 4 / 7
= 4 / 7
Học tốt nhé
