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

[1/7 Formula]
    Work: Calculate the value of equation 21.31+23.67 .
    Question type: Mathematical calculation
    Solution:
          21.31+23.67
        =44.98
    Answer:21.31+23.67=44.98
[2/7 Formula]
    Work: Calculate the value of equation 4.1+1.2 .
    Question type: Mathematical calculation
    Solution:
          4.1+1.2
        =5.3
    Answer:4.1+1.2=5.3
[3/7 Formula]
    Work: Calculate the value of equation 1.9+2.8 .
    Question type: Mathematical calculation
    Solution:
          1.9+2.8
        =4.7
    Answer:1.9+2.8=4.7
[4/7 Formula]
    Work: Calculate the value of equation 2.7+1.4 .
    Question type: Mathematical calculation
    Solution:
          2.7+1.4
        =4.1
    Answer:2.7+1.4=4.1
[5/7 Formula]
    Work: Calculate the value of equation 31.78+21.89 .
    Question type: Mathematical calculation
    Solution:
          31.78+21.89
        =53.67
    Answer:31.78+21.89=53.67
[6/7 Formula]
    Work: Calculate the value of equation 3.9+8.9 .
    Question type: Mathematical calculation
    Solution:
          3.9+8.9
        =12.8
    Answer:3.9+8.9=12.8
[7/7 Formula]
    Work: Calculate the value of equation 13.9+43.98 .
    Question type: Mathematical calculation
    Solution:
          13.9+43.98
        =57.88
    Answer:13.9+43.98=57.88

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>>注：本次最多计算 7 道题。

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