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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(40)-20*lg(0.12*40) .
Question type: Mathematical calculation
Solution:
20*lg(0.2)-20*lg(40)-20*lg(0.12*40)
=20*lg0.2-20*lg(40)-20*lg(0.12*40)
=20*lg0.2-20*lg40-20*lg(0.12*40)
=20*lg0.2-20*lg40-20*lg4.8
=20*-0.69897-20*lg40-20*lg4.8
=20*-0.69897-20*1.60206-20*lg4.8
=20*-0.69897-20*1.60206-20*0.681241
=-13.9794-20*1.60206-20*0.681241
=-13.9794-32.0412-20*0.681241
=-13.9794-32.0412-13.62482
=-46.0206-13.62482
=-59.64542
Answer:20*lg(0.2)-20*lg(40)-20*lg(0.12*40)=-59.64542