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

[1/7 Formula]
    Work: Calculate the value of equation 1028-53-47 .
    Question type: Mathematical calculation
    Solution:
          1028-53-47
        =975-47
        =928
    Answer:1028-53-47=928
[2/7 Formula]
    Work: Calculate the value of equation 1045-167-145 .
    Question type: Mathematical calculation
    Solution:
          1045-167-145
        =878-145
        =733
    Answer:1045-167-145=733
[3/7 Formula]
    Work: Calculate the value of equation 987-187-139-61 .
    Question type: Mathematical calculation
    Solution:
          987-187-139-61
        =800-139-61
        =661-61
        =600
    Answer:987-187-139-61=600
[4/7 Formula]
    Work: Calculate the value of equation 669-25-25-50 .
    Question type: Mathematical calculation
    Solution:
          669-25-25-50
        =644-25-50
        =619-50
        =569
    Answer:669-25-25-50=569
[5/7 Formula]
    Work: Calculate the value of equation 1145-180-245 .
    Question type: Mathematical calculation
    Solution:
          1145-180-245
        =965-245
        =720
    Answer:1145-180-245=720
[6/7 Formula]
    Work: Calculate the value of equation 655-(230-45) .
    Question type: Mathematical calculation
    Solution:
          655-(230-45)
        =655-185
        =470
    Answer:655-(230-45)=470
[7/7 Formula]
    Work: Calculate the value of equation 772-(36-28) .
    Question type: Mathematical calculation
    Solution:
          772-(36-28)
        =772-8
        =764
    Answer:772-(36-28)=764

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>>注：本次最多计算 7 道题。

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