a,\(\frac{6\times7\times8}{8\times9\times10}=\frac{6\times7}{9\times10}=\frac{7}{15}\)
\(\frac{7}{8}.\frac{9}{11}.\frac{8}{3}:\frac{2}{9}\)
\(=\frac{7.9.8.9}{8.11.3.2}\)
\(=\frac{189}{11}\)
Dấu \(\left(.\right)\)là dấu nhân nhé
\(\frac{6\times7\times8}{8\times9\times10}\)
\(=\frac{6\times7}{9\times10}\)
\(=\frac{42}{90}=\frac{7}{15}\)
\(\frac{6\times7\times8}{8\times9\times10}\)
\(=\frac{2\times3\times7\times8}{8\times3\times3\times2\times5}\)
\(=\frac{7}{15}\)
\(\frac{7}{8}\times\frac{9}{11}\times\frac{8}{3}:\frac{2}{9}\)
\(=\frac{63}{88}\times\frac{8}{3}\times\frac{9}{2}\)
\(=\frac{63}{88}\times12\)
\(=\frac{189}{11}\)
