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

[1/7 Formula]
    Work: Calculate the value of equation 70-21-18 .
    Question type: Mathematical calculation
    Solution:
          70-21-18
        =49-18
        =31
    Answer:70-21-18=31
[2/7 Formula]
    Work: Calculate the value of equation 94-24-16 .
    Question type: Mathematical calculation
    Solution:
          94-24-16
        =70-16
        =54
    Answer:94-24-16=54
[3/7 Formula]
    Work: Calculate the value of equation 89-24-13 .
    Question type: Mathematical calculation
    Solution:
          89-24-13
        =65-13
        =52
    Answer:89-24-13=52
[4/7 Formula]
    Work: Calculate the value of equation 90-22-44 .
    Question type: Mathematical calculation
    Solution:
          90-22-44
        =68-44
        =24
    Answer:90-22-44=24
[5/7 Formula]
    Work: Calculate the value of equation 95-10-13 .
    Question type: Mathematical calculation
    Solution:
          95-10-13
        =85-13
        =72
    Answer:95-10-13=72
[6/7 Formula]
    Work: Calculate the value of equation 88-50-21 .
    Question type: Mathematical calculation
    Solution:
          88-50-21
        =38-21
        =17
    Answer:88-50-21=17
[7/7 Formula]
    Work: Calculate the value of equation 81-31-22 .
    Question type: Mathematical calculation
    Solution:
          81-31-22
        =50-22
        =28
    Answer:81-31-22=28

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>>注：本次最多计算 7 道题。

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