题目内容
(lg
-lg25)÷100-
=( )
| 1 |
| 4 |
| 1 |
| 2 |
| A.-10 | B.10 | C.-20 | D.20 |
(lg
-lg25)÷100-
=(lg1-lg4-lg25)÷10-1
=(-lg100)×10
=-20.
故选C.
| 1 |
| 4 |
| 1 |
| 2 |
=(lg1-lg4-lg25)÷10-1
=(-lg100)×10
=-20.
故选C.
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