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

[1/7 Formula]
    Work: Calculate the value of equation 569-(253-31) .
    Question type: Mathematical calculation
    Solution:
          569-(253-31)
        =569-222
        =347
    Answer:569-(253-31)=347
[2/7 Formula]
    Work: Calculate the value of equation 672-(36-28) .
    Question type: Mathematical calculation
    Solution:
          672-(36-28)
        =672-8
        =664
    Answer:672-(36-28)=664
[3/7 Formula]
    Work: Calculate the value of equation 632-(136-68) .
    Question type: Mathematical calculation
    Solution:
          632-(136-68)
        =632-68
        =564
    Answer:632-(136-68)=564
[4/7 Formula]
    Work: Calculate the value of equation 456-(128-44) .
    Question type: Mathematical calculation
    Solution:
          456-(128-44)
        =456-84
        =372
    Answer:456-(128-44)=372
[5/7 Formula]
    Work: Calculate the value of equation 357-(135-43) .
    Question type: Mathematical calculation
    Solution:
          357-(135-43)
        =357-92
        =265
    Answer:357-(135-43)=265
[6/7 Formula]
    Work: Calculate the value of equation 665-(230-35) .
    Question type: Mathematical calculation
    Solution:
          665-(230-35)
        =665-195
        =470
    Answer:665-(230-35)=470
[7/7 Formula]
    Work: Calculate the value of equation 662-(36-38) .
    Question type: Mathematical calculation
    Solution:
          662-(36-38)
        =662-(-2)
        =664
    Answer:662-(36-38)=664

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>>注：本次最多计算 7 道题。

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