|-7| - |-3,6| : |1,2|; |-7/24|*|-1 1/7|*3;|-2,7|:|-1 4/5|*|1 5/9|;

1.
$7- \frac{3.6}{1.2}=4$
2.
$\frac{7}{24} * \frac{8}{7} *3= \frac{7*8*3}{8*3*7} =1$
3.
$\frac{27}{10} * \frac{5}{9} * \frac{14}{9} = \frac{27*5*14}{10*9*9} = \frac{3*14}{2*9} = \frac{42}{18} =2 \frac{1}{3}$
4.
$\frac{45}{7*9} + \frac{13}{3} = \frac{5}{7} + \frac{13}{3} = \frac{15+91}{21}= 5 \frac{1}{21}$

|-7| - |-3,6| : |1,2|; |-7/24|*|-1 1/7|*3;|-2,7|:|-1 4/5|*|1 5/9|; | 6 3/7|: |-9| +4...

|-7| - |-3,6| : |1,2|; |-7/24||-1 1/7|3;|-2,7|:|-1 4/5|*|1 5/9|; | 6 3/7|: |-9| +4...