Выполните действия: а) $$\frac{3\frac{1}{12}+2\frac{1}{6}-\frac{1}{8}}{1,4 + 0,6 \cdot 4,5}$$;

Решим пример:

1. $$\frac{1}{6} = \frac{1 \cdot 2}{6 \cdot 2} = \frac{2}{12}$$;
2. $$\frac{1}{8} = \frac{1 \cdot 1,5}{8 \cdot 1,5} = \frac{1,5}{12}$$;
3. $$3\frac{1}{12} + 2\frac{2}{12} - \frac{1,5}{12} = 5\frac{3}{12} - \frac{1,5}{12} = 5\frac{1,5}{12} = 5\frac{15}{120} = 5\frac{1}{8} = \frac{5 \cdot 8 + 1}{8} = \frac{41}{8}$$;
4. $$0,6 \cdot 4,5 = 2,7$$;
5. $$1,4 + 2,7 = 4,1$$;
6. $$\frac{41}{8} : 4,1 = \frac{41}{8} : \frac{41}{10} = \frac{41 \cdot 10}{8 \cdot 41} = \frac{10}{8} = \frac{5}{4} = 1,25$$.

Ответ: $$1,25$$