3/5-1/3-2/9 дробная черта 7/15+2/3-4/5=?

Question

3/5-1/3-2/9 дробная черта 7/15+2/3-4/5=?

Answer 1

3    1      2         27-15-10         2

__ - ___ -___=___________=____

5      3       9           45              45

7       2        4         7+10-12                   4

__+ ___ -____ =_____________=___________

15     3       5               15                        15    

(2/45)/(4/15)=2/45*15/2=1/6