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Enter the mathematical formula directly and click the "Next" button to get the calculation answer.
It supports mathematical functions (including trigonometric functions).
Current location：Mathematical operation > History of Mathematical Computation > Answer
Overview: 1 questions will be solved this time.Among them
☆1 arithmetic calculations
[1/1 Formula]
Work: Calculate the value of equation 20*lg0.05-20*lg90-20*lg45-20*lg15 .
Question type: Mathematical calculation
Solution:
20*lg0.05-20*lg90-20*lg45-20*lg15
=20*-1.30103-20*lg90-20*lg45-20*lg15
=20*-1.30103-20*1.954243-20*lg45-20*lg15
=20*-1.30103-20*1.954243-20*1.653213-20*lg15
=20*-1.30103-20*1.954243-20*1.653213-20*1.176091
=-26.0206-20*1.954243-20*1.653213-20*1.176091
=-26.0206-39.08486-20*1.653213-20*1.176091
=-26.0206-39.08486-33.06426-20*1.176091
=-26.0206-39.08486-33.06426-23.52182
=-65.10546-33.06426-23.52182
=-98.16972-23.52182
=-121.69154
Answer:20*lg0.05-20*lg90-20*lg45-20*lg15=-121.69154