Question

1g8+1g125-1g2-1g5

lg 10 •lg0.1

=______．

Answer 1

1g8+1g125-1g2-1g5

lg 10 •lg0.1

=

3lg2+3lg5-lg2-lg5

1 2 lg10•lg 1 10

=

2(lg2+lg5)

- 1 2

=-4
故答案为：-4．