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

[1/7 Formula]
    Work: Calculate the value of equation 355+260+140+245 .
    Question type: Mathematical calculation
    Solution:
          355+260+140+245
        =615+140+245
        =755+245
        =1000
    Answer:355+260+140+245=1000
[2/7 Formula]
    Work: Calculate the value of equation 645-180-245 .
    Question type: Mathematical calculation
    Solution:
          645-180-245
        =465-245
        =220
    Answer:645-180-245=220
[3/7 Formula]
    Work: Calculate the value of equation 987-(287-135) .
    Question type: Mathematical calculation
    Solution:
          987-(287-135)
        =987-152
        =835
    Answer:987-(287-135)=835
[4/7 Formula]
    Work: Calculate the value of equation 478+256+144 .
    Question type: Mathematical calculation
    Solution:
          478+256+144
        =734+144
        =878
    Answer:478+256+144=878
[5/7 Formula]
    Work: Calculate the value of equation 672+36+64 .
    Question type: Mathematical calculation
    Solution:
          672+36+64
        =708+64
        =772
    Answer:672+36+64=772
[6/7 Formula]
    Work: Calculate the value of equation 36+64+36+64 .
    Question type: Mathematical calculation
    Solution:
          36+64+36+64
        =100+36+64
        =136+64
        =200
    Answer:36+64+36+64=200
[7/7 Formula]
    Work: Calculate the value of equation 313+287+139+61 .
    Question type: Mathematical calculation
    Solution:
          313+287+139+61
        =600+139+61
        =739+61
        =800
    Answer:313+287+139+61=800

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>>注：本次最多计算 7 道题。

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