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

[1/7 Formula]
    Work: Calculate the value of equation 728-53-47 .
    Question type: Mathematical calculation
    Solution:
          728-53-47
        =675-47
        =628
    Answer:728-53-47=628
[2/7 Formula]
    Work: Calculate the value of equation 745-167-145 .
    Question type: Mathematical calculation
    Solution:
          745-167-145
        =578-145
        =433
    Answer:745-167-145=433
[3/7 Formula]
    Work: Calculate the value of equation 687-187-139-61 .
    Question type: Mathematical calculation
    Solution:
          687-187-139-61
        =500-139-61
        =361-61
        =300
    Answer:687-187-139-61=300
[4/7 Formula]
    Work: Calculate the value of equation 369-25-25-50 .
    Question type: Mathematical calculation
    Solution:
          369-25-25-50
        =344-25-50
        =319-50
        =269
    Answer:369-25-25-50=269
[5/7 Formula]
    Work: Calculate the value of equation 845-180-245 .
    Question type: Mathematical calculation
    Solution:
          845-180-245
        =665-245
        =420
    Answer:845-180-245=420
[6/7 Formula]
    Work: Calculate the value of equation 355-(230-45) .
    Question type: Mathematical calculation
    Solution:
          355-(230-45)
        =355-185
        =170
    Answer:355-(230-45)=170
[7/7 Formula]
    Work: Calculate the value of equation 472-(36-28) .
    Question type: Mathematical calculation
    Solution:
          472-(36-28)
        =472-8
        =464
    Answer:472-(36-28)=464

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>>注：本次最多计算 7 道题。

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