Решите дробь 1/15+1/18+1/12

216+180+270/3240=666/3240

[latex]\frac{1}{15}+\frac{1}{18}+\frac{1}{12}[/latex] [latex]1) \frac{1}{15}*18+\frac{1}{18}*15=\frac{18}{270}+\frac{15}{270}=\frac{33}{270}[/latex] [latex]2) \frac{33}{270}*12+\frac{1}{12}*270=\frac{396}{3240}+\frac{270}{3240}= \frac{666}{3240}[/latex]