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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*lg(0.2)-20*lg(45)-20*lg(0.12*45) .
Question type: Mathematical calculation
Solution:
20*lg(0.2)-20*lg(45)-20*lg(0.12*45)
=20*lg0.2-20*lg(45)-20*lg(0.12*45)
=20*lg0.2-20*lg45-20*lg(0.12*45)
=20*lg0.2-20*lg45-20*lg5.4
=20*-0.69897-20*lg45-20*lg5.4
=20*-0.69897-20*1.653213-20*lg5.4
=20*-0.69897-20*1.653213-20*0.732394
=-13.9794-20*1.653213-20*0.732394
=-13.9794-33.06426-20*0.732394
=-13.9794-33.06426-14.64788
=-47.04366-14.64788
=-61.69154
Answer:20*lg(0.2)-20*lg(45)-20*lg(0.12*45)=-61.69154