ko biet vi em moi hoc lop 3 thoi hihi
\(\frac{2}{3}.\frac{6}{11}-\frac{4}{11}.\frac{10}{15}+\frac{4}{6}.\frac{9}{11}\)
= \(\frac{2}{3}.\frac{6}{11}-\frac{4}{11}.\frac{2}{3}+\frac{2}{3}.\frac{9}{11}\)
= \(\frac{2}{3}.\left(\frac{6}{11}-\frac{4}{11}+\frac{9}{11}\right)\)
= \(\frac{2}{3}.1=\frac{2}{3}\)
\(\frac{2}{3}\times\frac{6}{11}-\frac{4}{11}\times\frac{10}{15}+\frac{4}{6}\times\frac{9}{11}\)
\(\Rightarrow\frac{2}{3}\times\frac{6}{11}-\frac{4}{11}\times\frac{2}{3}+\frac{2}{3}\times\frac{9}{11}\)
\(\Rightarrow\frac{2}{3}\times\left(\frac{6}{11}-\frac{4}{11}+\frac{9}{11}\right)\)
\(\Rightarrow\frac{2}{3}\times1\)
\(\Rightarrow\frac{2}{3}\)
\(HT\)
