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

[1/7 Formula]
    Work: Calculate the value of equation 19.19+4.12-1.8 .
    Question type: Mathematical calculation
    Solution:
          19.19+4.12-1.8
        =23.31-1.8
        =21.51
    Answer:19.19+4.12-1.8=21.51
[2/7 Formula]
    Work: Calculate the value of equation 7.4-6.11+2.187 .
    Question type: Mathematical calculation
    Solution:
          7.4-6.11+2.187
        =1.29+2.187
        =3.477
    Answer:7.4-6.11+2.187=3.477
[3/7 Formula]
    Work: Calculate the value of equation 78.27+1.65-1.4 .
    Question type: Mathematical calculation
    Solution:
          78.27+1.65-1.4
        =79.92-1.4
        =78.52
    Answer:78.27+1.65-1.4=78.52
[4/7 Formula]
    Work: Calculate the value of equation 7.2-6.91+4.38 .
    Question type: Mathematical calculation
    Solution:
          7.2-6.91+4.38
        =0.29+4.38
        =4.67
    Answer:7.2-6.91+4.38=4.67
[5/7 Formula]
    Work: Calculate the value of equation 19.278+5.2-2.13 .
    Question type: Mathematical calculation
    Solution:
          19.278+5.2-2.13
        =24.478-2.13
        =22.348
    Answer:19.278+5.2-2.13=22.348
[6/7 Formula]
    Work: Calculate the value of equation 5.04-1.9+546.3 .
    Question type: Mathematical calculation
    Solution:
          5.04-1.9+546.3
        =3.14+546.3
        =549.44
    Answer:5.04-1.9+546.3=549.44
[7/7 Formula]
    Work: Calculate the value of equation 278.35+5.2-2.13 .
    Question type: Mathematical calculation
    Solution:
          278.35+5.2-2.13
        =283.55-2.13
        =281.42
    Answer:278.35+5.2-2.13=281.42

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>>注：本次最多计算 7 道题。

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