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

[1/7 Formula]
    Work: Calculate the value of equation 7+52-7 .
    Question type: Mathematical calculation
    Solution:
          7+52-7
        =59-7
        =52
    Answer:7+52-7=52
[2/7 Formula]
    Work: Calculate the value of equation 57+5-11 .
    Question type: Mathematical calculation
    Solution:
          57+5-11
        =62-11
        =51
    Answer:57+5-11=51
[3/7 Formula]
    Work: Calculate the value of equation 80-4+12 .
    Question type: Mathematical calculation
    Solution:
          80-4+12
        =76+12
        =88
    Answer:80-4+12=88
[4/7 Formula]
    Work: Calculate the value of equation 69-4+23 .
    Question type: Mathematical calculation
    Solution:
          69-4+23
        =65+23
        =88
    Answer:69-4+23=88
[5/7 Formula]
    Work: Calculate the value of equation 91-87+57 .
    Question type: Mathematical calculation
    Solution:
          91-87+57
        =4+57
        =61
    Answer:91-87+57=61
[6/7 Formula]
    Work: Calculate the value of equation 65+28-46 .
    Question type: Mathematical calculation
    Solution:
          65+28-46
        =93-46
        =47
    Answer:65+28-46=47
[7/7 Formula]
    Work: Calculate the value of equation 85-70+16 .
    Question type: Mathematical calculation
    Solution:
          85-70+16
        =15+16
        =31
    Answer:85-70+16=31

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>>注：本次最多计算 7 道题。

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