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

[1/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 75-4
    Solution:
    75-4 = 71
    Column vertical calculation:

			7	5
➖				4
			7	1

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 88-3
    Solution:
    88-3 = 85
    Column vertical calculation:

			8	8
➖				3
			8	5

[3/7 Formula]
    Work: Calculate the value of equation 19.2-1.2 .
    Question type: Mathematical calculation
    Solution:
          19.2-1.2
        =18
    Answer:19.2-1.2=18
[4/7 Formula]
    Work: Calculate the value of equation 7.4+1.8 .
    Question type: Mathematical calculation
    Solution:
          7.4+1.8
        =9.2
    Answer:7.4+1.8=9.2
[5/7 Formula]
    Work: Calculate the value of equation 7.7+5.8 .
    Question type: Mathematical calculation
    Solution:
          7.7+5.8
        =13.5
    Answer:7.7+5.8=13.5
[6/7 Formula]
    Work: Calculate the value of equation 15.3+6 .
    Question type: Mathematical calculation
    Solution:
          15.3+6
        =21.3
    Answer:15.3+6=21.3
[7/7 Formula]
    Work: Calculate the value of equation 12.5-3.9 .
    Question type: Mathematical calculation
    Solution:
          12.5-3.9
        =8.6
    Answer:12.5-3.9=8.6

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>>注：本次最多计算 7 道题。

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