Overview: 7 questions will be solved this time.Among them
           ☆7 arithmetic calculations

[1/7 Formula]
    Work: Calculate the value of equation 0.2*(0.3+0.4+0.5+0.9)*(3.3-0.1) .
    Question type: Mathematical calculation
    Solution:
          0.2*(0.3+0.4+0.5+0.9)*(3.3-0.1)
        =0.2*2.1*(3.3-0.1)
        =0.2*2.1*3.2
        =0.42*3.2
        =1.344
    Answer:0.2*(0.3+0.4+0.5+0.9)*(3.3-0.1)=1.344
[2/7 Formula]
    Work: Calculate the value of equation 0.2*(0.3+2.3+0.4+0.5)*(4.2-0.12) .
    Question type: Mathematical calculation
    Solution:
          0.2*(0.3+2.3+0.4+0.5)*(4.2-0.12)
        =0.2*3.5*(4.2-0.12)
        =0.2*3.5*4.08
        =0.7*4.08
        =2.856
    Answer:0.2*(0.3+2.3+0.4+0.5)*(4.2-0.12)=2.856
[3/7 Formula]
    Work: Calculate the value of equation 0.2*(0.3+0.3+0.4+0.9)*(4.2-0.12) .
    Question type: Mathematical calculation
    Solution:
          0.2*(0.3+0.3+0.4+0.9)*(4.2-0.12)
        =0.2*1.9*(4.2-0.12)
        =0.2*1.9*4.08
        =0.38*4.08
        =1.5504
    Answer:0.2*(0.3+0.3+0.4+0.9)*(4.2-0.12)=1.5504
[4/7 Formula]
    Work: Calculate the value of equation 0.2*(0.3+0.4+0.9)*(3.3-0.1) .
    Question type: Mathematical calculation
    Solution:
          0.2*(0.3+0.4+0.9)*(3.3-0.1)
        =0.2*1.6*(3.3-0.1)
        =0.2*1.6*3.2
        =0.32*3.2
        =1.024
    Answer:0.2*(0.3+0.4+0.9)*(3.3-0.1)=1.024
[5/7 Formula]
    Work: Calculate the value of equation 0.2*(0.85+0.7)*(0.9-0.1) .
    Question type: Mathematical calculation
    Solution:
          0.2*(0.85+0.7)*(0.9-0.1)
        =0.2*1.55*(0.9-0.1)
        =0.2*1.55*0.8
        =0.31*0.8
        =0.248
    Answer:0.2*(0.85+0.7)*(0.9-0.1)=0.248
[6/7 Formula]
    Work: Calculate the value of equation 0.2*(0.3+1)*(4.2-0.12) .
    Question type: Mathematical calculation
    Solution:
          0.2*(0.3+1)*(4.2-0.12)
        =0.2*1.3*(4.2-0.12)
        =0.2*1.3*4.08
        =0.26*4.08
        =1.0608
    Answer:0.2*(0.3+1)*(4.2-0.12)=1.0608
[7/7 Formula]
    Work: Calculate the value of equation 0.2*(0.3+0.4+0.6+0.9)*(3.3-0.1) .
    Question type: Mathematical calculation
    Solution:
          0.2*(0.3+0.4+0.6+0.9)*(3.3-0.1)
        =0.2*2.2*(3.3-0.1)
        =0.2*2.2*3.2
        =0.44*3.2
        =1.408
    Answer:0.2*(0.3+0.4+0.6+0.9)*(3.3-0.1)=1.408

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>>注：本次最多计算 7 道题。

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