Question

помогите решить примеры -5/12+1/30. 6-3 5/9. -8*5/16. -9/10*(-5/12). 1 3/4*(-1 5/7)...

Answer 1

-5/12+1/30=1/30-5/12=(2*1-5*5)/60=-23/60.
6-3 5/9=6-32/9=(6*9-32)/9=22/9=2 4/9.
 -8*5/16=-40/16=-2,5.
-9/10*(-5/12)=9*5/(10*12)=45/120=0,375.
1 3/4*(-1 5/7)=7/4*(-12/7)=-3.