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

[1/7 Formula]
    Work: Calculate the value of equation 469-91+133 .
    Question type: Mathematical calculation
    Solution:
          469-91+133
        =378+133
        =511
    Answer:469-91+133=511
[2/7 Formula]
    Work: Calculate the value of equation 823-245-65 .
    Question type: Mathematical calculation
    Solution:
          823-245-65
        =578-65
        =513
    Answer:823-245-65=513
[3/7 Formula]
    Work: Calculate the value of equation 715-236-94 .
    Question type: Mathematical calculation
    Solution:
          715-236-94
        =479-94
        =385
    Answer:715-236-94=385
[4/7 Formula]
    Work: Calculate the value of equation 1584-999+785 .
    Question type: Mathematical calculation
    Solution:
          1584-999+785
        =585+785
        =1370
    Answer:1584-999+785=1370
[5/7 Formula]
    Work: Calculate the value of equation 2478-726+248 .
    Question type: Mathematical calculation
    Solution:
          2478-726+248
        =1752+248
        =2000
    Answer:2478-726+248=2000
[6/7 Formula]
    Work: Calculate the value of equation 7156-234+247 .
    Question type: Mathematical calculation
    Solution:
          7156-234+247
        =6922+247
        =7169
    Answer:7156-234+247=7169
[7/7 Formula]
    Work: Calculate the value of equation 1557-344+215 .
    Question type: Mathematical calculation
    Solution:
          1557-344+215
        =1213+215
        =1428
    Answer:1557-344+215=1428

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>>注：本次最多计算 7 道题。

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