Ответ:

[tex]\frac{18*2,4}{0,36} =\frac{2,4}{0,02} =2\frac{4}{10} :\frac{2}{100} =\frac{24*100}{10*2} =12*10=120[/tex]

[tex]\frac{5,4*0,8}{0,12} =\frac{5,4*2}{0,3} =\frac{10,8}{0,3} =10\frac{8}{10} :\frac{3}{10} =\frac{108*10}{10*3} =36[/tex]