Question

-1 1/7•(4/5+19/20)•(6 5/6+4 2/3)

Answer 1

-1*1/7*(4/5+19/20)*(6*5/6+4*2/3)=0
1) 4/5+19/20=16 /20*19/20
(16*19=сама)
2)6*5/6+4*2/3=24(5/6+2/3)=24*14=сама
3)-1*1/7 * (1) * (2) =0