Tính: 3/5 x 2/7 x 5/6

* Hướng dẫn giải

$\frac{3}{5}x\frac{2}{7}x\frac{5}{6}\mathit{=}\frac{\mathit{3}\mathit{ }\mathit{x}\mathit{ }\mathit{2}\mathit{ }\mathit{x}\mathit{ }\mathit{5}}{\mathit{5}\mathit{ }\mathit{x}\mathit{ }\mathit{7}\mathit{ }\mathit{x}\mathit{ }\mathit{6}}\mathit{=}\frac{\mathit{3}\mathit{ }\mathit{x}\mathit{ }\mathit{2}}{\mathit{7}\mathit{ }\mathit{x}\mathit{ }\mathit{6}}\mathit{=}\frac{\mathit{6}}{\mathit{7}\mathit{ }\mathit{x}\mathit{ }\mathit{6}}\mathit{=}\frac{\mathit{1}}{\mathit{7}}$