Մաթեմատիկա 14․04․2021

928.

         2       1

12   –– – 2 – =(12-2)+(2/15-1/5)=15+ 15 15/17=15+2+1/15=25/15

       15       5

     

9        7                                                                                       

23 –– – 2 ––=(23-2)+(9/34-7/17)=34 + 35/34=35+34 33/34=33+33/35

     34      17