( 1/2)LG 0.3 =( 1/2)LG(3/ 10)= LGì(3/ 10)= LGì(3)-LGì( 10)= LG。

1/2 is the root sign.

lg√27=lg(√3)^3=3lg(√3)√27=(√3)^3

lg8=lg2^3=3lg2

log4(8)=log4(4*2)=log4(4)

log4(2)= 1

1/2=3*( 1/2)

Then the total formula is lg√27.

lg8-log4(8)=3lg(√3)

3lg2- 1/2

1/2lg0.3

lg2=lg√(3)

lg2- 1/2

Then three.

Seeing this problem is so messy, I want to simplify it. If generalized, it can be eliminated in the future. It's important to dare to try.