问题 填空题
1g8+1g125-1g2-1g5
lg
10
•lg0.1
=______.
答案

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.

选择题
选择题