(1/30-5/6)-(-3,9-2,2)-5,3

Решите задачу:

$1) \frac{1}{30} - \frac{5}{6} = \frac{30-25}{30} = \frac{5}{30} = \frac{1}{6} \\ 2)-3,9-2,2=-6,1 \\ 3) \frac{1}{6} -(-6,1)= \frac{1}{6} + \frac{61}{10} = \frac{5+183}{30} = \frac{188}{30} \\ 4) \frac{188}{30} -5,3= \frac{188}{30} - \frac{53}{10} = \frac{188-159}{30} = \frac{29}{30} \\ \\ \\ ( \frac{1}{30} - \frac{5}{6} )-(-3,9-2,2)-5,3=( \frac{1}{30} - \frac{5}{6} )+3,9+2,2-5,3=$ $\frac{30-25}{30} +0,8= \frac{1}{6} +0,8= \frac{1}{6} + \frac{8}{10} = \frac{5+24}{30} = \frac{29}{30}$