\(\frac{4\times5\times6}{12\times15\times9}\)\(=\frac{2\times2\times5\times6}{2\times6\times3\times5\times9}\)\(=\frac{2}{3\times9}\)\(=\frac{2}{27}\)
\(\frac{6\times8\times11}{33\times16}\)\(=\frac{2\times3\times8\times11}{3\times11\times8\times2}\)\(=\)\(1\)
~ HOK TỐT ~