Overview: 3 questions will be solved this time.Among them
           ☆3 arithmetic calculations

[1/3 Formula]
    Work: Calculate the value of equation 1+1.1+1.2+1.3+1.4+1.5+1.6+1.7+1.8+1.9+2 .
    Question type: Mathematical calculation
    Solution:
          1+1.1+1.2+1.3+1.4+1.5+1.6+1.7+1.8+1.9+2
        =2.1+1.2+1.3+1.4+1.5+1.6+1.7+1.8+1.9+2
        =3.3+1.3+1.4+1.5+1.6+1.7+1.8+1.9+2
        =4.6+1.4+1.5+1.6+1.7+1.8+1.9+2
        =6+1.5+1.6+1.7+1.8+1.9+2
        =7.5+1.6+1.7+1.8+1.9+2
        =9.1+1.7+1.8+1.9+2
        =10.8+1.8+1.9+2
        =12.6+1.9+2
        =14.5+2
        =16.5
    Answer:1+1.1+1.2+1.3+1.4+1.5+1.6+1.7+1.8+1.9+2=16.5
[2/3 Formula]
    Work: Calculate the value of equation (9+8.1+7.11+6.111+5.1111+4.11111+3.111111)÷21.06172835 .
    Question type: Mathematical calculation
    Solution:
          (9+8.1+7.11+6.111+5.1111+4.11111+3.111111)÷21.06172835
        =42.654321÷21.06172835
        =2.025205
    Answer:(9+8.1+7.11+6.111+5.1111+4.11111+3.111111)÷21.06172835=2.025205
[3/3 Formula]
    Work: Calculate the value of equation 98765.4321×1234.56789-98765.4322×1234.56788 .
    Question type: Mathematical calculation
    Solution:
          98765.4321×1234.56789-98765.4322×1234.56788
        =121932631.112635-98765.4322×1234.56788
        =121932631.112635-121932630.248438
        =0.864197
    Answer:98765.4321×1234.56789-98765.4322×1234.56788=0.864197

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