Logs

log₁₀(100) + log₁₀(0.001)    by a log property, we can write

log₁₀ (100 * 0.001)  =

log₁₀ (100 * 1/1000)  =

log₁₀ (1/10) =

log₁₀ 10^-1  =

-1* log₁₀10  =

-1 * 1  =

-1