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

[1/7 Formula]
    Work: Calculate the value of equation 1072-436-264 .
    Question type: Mathematical calculation
    Solution:
          1072-436-264
        =636-264
        =372
    Answer:1072-436-264=372
[2/7 Formula]
    Work: Calculate the value of equation 1672-536-364 .
    Question type: Mathematical calculation
    Solution:
          1672-536-364
        =1136-364
        =772
    Answer:1672-536-364=772
[3/7 Formula]
    Work: Calculate the value of equation 928-553-247 .
    Question type: Mathematical calculation
    Solution:
          928-553-247
        =375-247
        =128
    Answer:928-553-247=128
[4/7 Formula]
    Work: Calculate the value of equation 545-167-145+167 .
    Question type: Mathematical calculation
    Solution:
          545-167-145+167
        =378-145+167
        =233+167
        =400
    Answer:545-167-145+167=400
[5/7 Formula]
    Work: Calculate the value of equation 113+246+55+54+287 .
    Question type: Mathematical calculation
    Solution:
          113+246+55+54+287
        =359+55+54+287
        =414+54+287
        =468+287
        =755
    Answer:113+246+55+54+287=755
[6/7 Formula]
    Work: Calculate the value of equation 15+137+435+663+150 .
    Question type: Mathematical calculation
    Solution:
          15+137+435+663+150
        =152+435+663+150
        =587+663+150
        =1250+150
        =1400
    Answer:15+137+435+663+150=1400
[7/7 Formula]
    Work: Calculate the value of equation 987-487-139-61 .
    Question type: Mathematical calculation
    Solution:
          987-487-139-61
        =500-139-61
        =361-61
        =300
    Answer:987-487-139-61=300

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>>注：本次最多计算 7 道题。

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