(3/8-1/9)+25/36 (8/9-5/6)+2/3

Question

(3/8-1/9)+25/36 (8/9-5/6)+2/3

Answer 1

если не ошибаюсь, то вот.

1 пример

1)3*9/8*9-1*8/9*8=27/72-8/72=19/72

2)19/72+25*2/36*2=19/72+50/72=69/72

2 пример  

1)8*4/9*4-5*6/6*6=32/36-30/36=-(30-32/36)=-2/36 делит на 2=-1/18

2)-1/18+26*6/3*6=+(1/18-156/18)=-(156-1/18)=-155/18