Overview: 4 questions will be solved this time.Among them
           ☆4 arithmetic calculations

[1/4 Formula]
    Work: Calculate the value of equation 1/12+12/123+123/1234 .
    Question type: Mathematical calculation
    Solution:
          1/12+12/123+123/1234
        =0.083333+12/123+123/1234
        =0.083333+0.097561+123/1234
        =0.083333+0.097561+0.099676
        =0.180894+0.099676
        =0.28057
    Answer:1/12+12/123+123/1234=0.28057
[2/4 Formula]
    Work: Calculate the value of equation 1/11+11/111+111/1111 .
    Question type: Mathematical calculation
    Solution:
          1/11+11/111+111/1111
        =0.090909+11/111+111/1111
        =0.090909+0.099099+111/1111
        =0.090909+0.099099+0.09991
        =0.190008+0.09991
        =0.289918
    Answer:1/11+11/111+111/1111=0.289918
[3/4 Formula]
    Work: Calculate the value of equation 1/10+10/100+100/1000 .
    Question type: Mathematical calculation
    Solution:
          1/10+10/100+100/1000
        =0.1+10/100+100/1000
        =0.1+0.1+100/1000
        =0.1+0.1+0.1
        =0.2+0.1
        =0.3
    Answer:1/10+10/100+100/1000=0.3
[4/4 Formula]
    Work: Calculate the value of equation 1/9+11/119+111/1119 .
    Question type: Mathematical calculation
    Solution:
          1/9+11/119+111/1119
        =0.111111+11/119+111/1119
        =0.111111+0.092437+111/1119
        =0.111111+0.092437+0.099196
        =0.203548+0.099196
        =0.302744
    Answer:1/9+11/119+111/1119=0.302744

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