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

[1/7 Formula]
    Work: Calculate the value of equation 769-(253-31) .
    Question type: Mathematical calculation
    Solution:
          769-(253-31)
        =769-222
        =547
    Answer:769-(253-31)=547
[2/7 Formula]
    Work: Calculate the value of equation 872-(36-28) .
    Question type: Mathematical calculation
    Solution:
          872-(36-28)
        =872-8
        =864
    Answer:872-(36-28)=864
[3/7 Formula]
    Work: Calculate the value of equation 832-(136-68) .
    Question type: Mathematical calculation
    Solution:
          832-(136-68)
        =832-68
        =764
    Answer:832-(136-68)=764
[4/7 Formula]
    Work: Calculate the value of equation 756-(128-44) .
    Question type: Mathematical calculation
    Solution:
          756-(128-44)
        =756-84
        =672
    Answer:756-(128-44)=672
[5/7 Formula]
    Work: Calculate the value of equation 557-(135-43) .
    Question type: Mathematical calculation
    Solution:
          557-(135-43)
        =557-92
        =465
    Answer:557-(135-43)=465
[6/7 Formula]
    Work: Calculate the value of equation 865-(230-35) .
    Question type: Mathematical calculation
    Solution:
          865-(230-35)
        =865-195
        =670
    Answer:865-(230-35)=670
[7/7 Formula]
    Work: Calculate the value of equation 862-(36-38) .
    Question type: Mathematical calculation
    Solution:
          862-(36-38)
        =862-(-2)
        =864
    Answer:862-(36-38)=864

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>>注：本次最多计算 7 道题。

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