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

[1/7 Formula]
    Work: Calculate the value of equation 672-36-64+30 .
    Question type: Mathematical calculation
    Solution:
          672-36-64+30
        =636-64+30
        =572+30
        =602
    Answer:672-36-64+30=602
[2/7 Formula]
    Work: Calculate the value of equation 672-36-64+50 .
    Question type: Mathematical calculation
    Solution:
          672-36-64+50
        =636-64+50
        =572+50
        =622
    Answer:672-36-64+50=622
[3/7 Formula]
    Work: Calculate the value of equation 528-53-47+45 .
    Question type: Mathematical calculation
    Solution:
          528-53-47+45
        =475-47+45
        =428+45
        =473
    Answer:528-53-47+45=473
[4/7 Formula]
    Work: Calculate the value of equation 545-167-145+67 .
    Question type: Mathematical calculation
    Solution:
          545-167-145+67
        =378-145+67
        =233+67
        =300
    Answer:545-167-145+67=300
[5/7 Formula]
    Work: Calculate the value of equation 213+146+54+287 .
    Question type: Mathematical calculation
    Solution:
          213+146+54+287
        =359+54+287
        =413+287
        =700
    Answer:213+146+54+287=700
[6/7 Formula]
    Work: Calculate the value of equation 15+137+45+163 .
    Question type: Mathematical calculation
    Solution:
          15+137+45+163
        =152+45+163
        =197+163
        =360
    Answer:15+137+45+163=360
[7/7 Formula]
    Work: Calculate the value of equation 887-187-239-161 .
    Question type: Mathematical calculation
    Solution:
          887-187-239-161
        =700-239-161
        =461-161
        =300
    Answer:887-187-239-161=300

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>>注：本次最多计算 7 道题。

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