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

[1/7 Formula]
    Work: Calculate the value of equation 487-287+139+61 .
    Question type: Mathematical calculation
    Solution:
          487-287+139+61
        =200+139+61
        =339+61
        =400
    Answer:487-287+139+61=400
[2/7 Formula]
    Work: Calculate the value of equation 357-257+43-143 .
    Question type: Mathematical calculation
    Solution:
          357-257+43-143
        =100+43-143
        =143-143
        =0
    Answer:357-257+43-143=0
[3/7 Formula]
    Work: Calculate the value of equation 698+291+9 .
    Question type: Mathematical calculation
    Solution:
          698+291+9
        =989+9
        =998
    Answer:698+291+9=998
[4/7 Formula]
    Work: Calculate the value of equation 155+264+36+44 .
    Question type: Mathematical calculation
    Solution:
          155+264+36+44
        =419+36+44
        =455+44
        =499
    Answer:155+264+36+44=499
[5/7 Formula]
    Work: Calculate the value of equation 568-(68+178) .
    Question type: Mathematical calculation
    Solution:
          568-(68+178)
        =568-246
        =322
    Answer:568-(68+178)=322
[6/7 Formula]
    Work: Calculate the value of equation 561+58+39 .
    Question type: Mathematical calculation
    Solution:
          561+58+39
        =619+39
        =658
    Answer:561+58+39=658
[7/7 Formula]
    Work: Calculate the value of equation 382+165+35-82 .
    Question type: Mathematical calculation
    Solution:
          382+165+35-82
        =547+35-82
        =582-82
        =500
    Answer:382+165+35-82=500

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>>注：本次最多计算 7 道题。

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