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

[1/7 Formula]
    Work: Calculate the value of equation 558+443-458+457 .
    Question type: Mathematical calculation
    Solution:
          558+443-458+457
        =1001-458+457
        =543+457
        =1000
    Answer:558+443-458+457=1000
[2/7 Formula]
    Work: Calculate the value of equation 499+424+501+476 .
    Question type: Mathematical calculation
    Solution:
          499+424+501+476
        =923+501+476
        =1424+476
        =1900
    Answer:499+424+501+476=1900
[3/7 Formula]
    Work: Calculate the value of equation 585+1033+515+467 .
    Question type: Mathematical calculation
    Solution:
          585+1033+515+467
        =1618+515+467
        =2133+467
        =2600
    Answer:585+1033+515+467=2600
[4/7 Formula]
    Work: Calculate the value of equation 1142+529+558+471 .
    Question type: Mathematical calculation
    Solution:
          1142+529+558+471
        =1671+558+471
        =2229+471
        =2700
    Answer:1142+529+558+471=2700
[5/7 Formula]
    Work: Calculate the value of equation 768+539-568+661 .
    Question type: Mathematical calculation
    Solution:
          768+539-568+661
        =1307-568+661
        =739+661
        =1400
    Answer:768+539-568+661=1400
[6/7 Formula]
    Work: Calculate the value of equation 618+439+461 .
    Question type: Mathematical calculation
    Solution:
          618+439+461
        =1057+461
        =1518
    Answer:618+439+461=1518
[7/7 Formula]
    Work: Calculate the value of equation 418+438-338 .
    Question type: Mathematical calculation
    Solution:
          418+438-338
        =856-338
        =518
    Answer:418+438-338=518

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>>注：本次最多计算 7 道题。

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