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

[1/7 Formula]
    Work: Calculate the value of equation 258+143-158+157 .
    Question type: Mathematical calculation
    Solution:
          258+143-158+157
        =401-158+157
        =243+157
        =400
    Answer:258+143-158+157=400
[2/7 Formula]
    Work: Calculate the value of equation 199+124+201+176 .
    Question type: Mathematical calculation
    Solution:
          199+124+201+176
        =323+201+176
        =524+176
        =700
    Answer:199+124+201+176=700
[3/7 Formula]
    Work: Calculate the value of equation 285+633+115+67 .
    Question type: Mathematical calculation
    Solution:
          285+633+115+67
        =918+115+67
        =1033+67
        =1100
    Answer:285+633+115+67=1100
[4/7 Formula]
    Work: Calculate the value of equation 742+129+158+171 .
    Question type: Mathematical calculation
    Solution:
          742+129+158+171
        =871+158+171
        =1029+171
        =1200
    Answer:742+129+158+171=1200
[5/7 Formula]
    Work: Calculate the value of equation 368+139-168+261 .
    Question type: Mathematical calculation
    Solution:
          368+139-168+261
        =507-168+261
        =339+261
        =600
    Answer:368+139-168+261=600
[6/7 Formula]
    Work: Calculate the value of equation 218+39+61 .
    Question type: Mathematical calculation
    Solution:
          218+39+61
        =257+61
        =318
    Answer:218+39+61=318
[7/7 Formula]
    Work: Calculate the value of equation 218+138-38 .
    Question type: Mathematical calculation
    Solution:
          218+138-38
        =356-38
        =318
    Answer:218+138-38=318

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>>注：本次最多计算 7 道题。

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