Сколько будет 1)7 целых 1\6-6,2 2)9 целых 4\15-1,8

     1  \5        2 \3                1*5 - 2*3                   5-6
7   -  6 = (7-6)+( ) = 1 + =
     6            10                       30                        30

= 1+ (-1/30) = 30/30 - 1/30 = -29/30

       4 \2            8 \3                  4*2 - 8*3                 8 - 24
9 - 1 = (9-1)+() = 8 + =
     15              10                          30                       30
= 8 + 16/30 = 8 16/30 = 8 8/15