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

[1/7 Formula]
    Work: Calculate the value of equation 455+260+740+445 .
    Question type: Mathematical calculation
    Solution:
          455+260+740+445
        =715+740+445
        =1455+445
        =1900
    Answer:455+260+740+445=1900
[2/7 Formula]
    Work: Calculate the value of equation 945-180-345+80 .
    Question type: Mathematical calculation
    Solution:
          945-180-345+80
        =765-345+80
        =420+80
        =500
    Answer:945-180-345+80=500
[3/7 Formula]
    Work: Calculate the value of equation 987-287+135 .
    Question type: Mathematical calculation
    Solution:
          987-287+135
        =700+135
        =835
    Answer:987-287+135=835
[4/7 Formula]
    Work: Calculate the value of equation 458+276+142 .
    Question type: Mathematical calculation
    Solution:
          458+276+142
        =734+142
        =876
    Answer:458+276+142=876
[5/7 Formula]
    Work: Calculate the value of equation 672+56+44 .
    Question type: Mathematical calculation
    Solution:
          672+56+44
        =728+44
        =772
    Answer:672+56+44=772
[6/7 Formula]
    Work: Calculate the value of equation 136+64+436+64 .
    Question type: Mathematical calculation
    Solution:
          136+64+436+64
        =200+436+64
        =636+64
        =700
    Answer:136+64+436+64=700
[7/7 Formula]
    Work: Calculate the value of equation 487-287+139+61 .
    Question type: Mathematical calculation
    Solution:
          487-287+139+61
        =200+139+61
        =339+61
        =400
    Answer:487-287+139+61=400

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>>注：本次最多计算 7 道题。

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