5/9:2,4 - 41/9:2,4

Lời giải:

 \(\frac{5}{9}:2,4 - \frac{{41}}{9}:2,4 = \frac{5}{9}:\frac{{12}}{5} - \frac{{41}}{9}:\frac{{12}}{5}\)

\( = \frac{5}{9}.\frac{5}{{12}} - \frac{{41}}{9}.\frac{5}{{12}} = \left( {\frac{5}{9} - \frac{{41}}{9}} \right).\frac{5}{{12}}\)

\( = - 4.\frac{5}{{12}} = - \frac{5}{3}\);