How do you evaluate log10−2? Precalculus Properties of Logarithmic Functions Common Logs 1 Answer Gió Mar 18, 2016 I found −2 if in base 10. Explanation: We can take the −2 and put it in front of the log: log10−2=−2log10= if your log is in base 10 you then get (from the definition of log): =−2⋅1=−2 Answer link Related questions What is the common logarithm of 10? How do I find the common logarithm of a number? What is a common logarithm or common log? What are common mistakes students make with common log? How do I find the common logarithm of 589,000? How do I find the number whose common logarithm is 2.6025? What is the common logarithm of 54.29? What is the value of the common logarithm log 10,000? What is log1010? How do I work in log10 in Excel? See all questions in Common Logs Impact of this question 32400 views around the world You can reuse this answer Creative Commons License