求值: lg500+lg 8 5 - 1 2 lg64+50 (lg2+lg5) 2 =______

求值: lg500+lg 8 5 - 1 2 lg64+50 (lg2+lg5) 2 =______.
2025-02-27 22:29:52
推荐回答(1个)
回答1:

lg500+lg
8
5
-
1
2
lg64+50 (lg2+lg5) 2

=lg(5×10 2 )+lg8-lg5-lg
64
+50[lg(2×5)] 2
=lg5+2+lg8-lg5-lg8+50
=52.
故答案为52