Mathematics
         
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    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(55)-20*lg(0.12*55)-20*lg(0.02*55) .
    Question type: Mathematical calculation
    Solution:
          20*lg(0.2)-20*lg(55)-20*lg(0.12*55)-20*lg(0.02*55)
        =20*lg0.2-20*lg(55)-20*lg(0.12*55)-20*lg(0.02*55)
        =20*lg0.2-20*lg55-20*lg(0.12*55)-20*lg(0.02*55)
        =20*lg0.2-20*lg55-20*lg6.6-20*lg(0.02*55)
        =20*lg0.2-20*lg55-20*lg6.6-20*lg1.1
        =20*-0.69897-20*lg55-20*lg6.6-20*lg1.1
        =20*-0.69897-20*1.740363-20*lg6.6-20*lg1.1
        =20*-0.69897-20*1.740363-20*0.819544-20*lg1.1
        =20*-0.69897-20*1.740363-20*0.819544-20*0.041393
        =-13.9794-20*1.740363-20*0.819544-20*0.041393
        =-13.9794-34.80726-20*0.819544-20*0.041393
        =-13.9794-34.80726-16.39088-20*0.041393
        =-13.9794-34.80726-16.39088-0.82786
        =-48.78666-16.39088-0.82786
        =-65.17754-0.82786
        =-66.0054

    Answer:20*lg(0.2)-20*lg(55)-20*lg(0.12*55)-20*lg(0.02*55)=-66.0054


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