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

[1/7 Formula]
    Work: Calculate the value of equation 528-53-47 .
    Question type: Mathematical calculation
    Solution:
          528-53-47
        =475-47
        =428
    Answer:528-53-47=428
[2/7 Formula]
    Work: Calculate the value of equation 545-167-145 .
    Question type: Mathematical calculation
    Solution:
          545-167-145
        =378-145
        =233
    Answer:545-167-145=233
[3/7 Formula]
    Work: Calculate the value of equation 487-187-139-61 .
    Question type: Mathematical calculation
    Solution:
          487-187-139-61
        =300-139-61
        =161-61
        =100
    Answer:487-187-139-61=100
[4/7 Formula]
    Work: Calculate the value of equation 169-25-25-50 .
    Question type: Mathematical calculation
    Solution:
          169-25-25-50
        =144-25-50
        =119-50
        =69
    Answer:169-25-25-50=69
[5/7 Formula]
    Work: Calculate the value of equation 645-180-245 .
    Question type: Mathematical calculation
    Solution:
          645-180-245
        =465-245
        =220
    Answer:645-180-245=220
[6/7 Formula]
    Work: Calculate the value of equation 155-(230-45) .
    Question type: Mathematical calculation
    Solution:
          155-(230-45)
        =155-185
        =-30
    Answer:155-(230-45)=-30
[7/7 Formula]
    Work: Calculate the value of equation 272-(36-28) .
    Question type: Mathematical calculation
    Solution:
          272-(36-28)
        =272-8
        =264
    Answer:272-(36-28)=264

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>>注：本次最多计算 7 道题。

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