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

[1/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 89-15
    Solution:
    89-15 = 74
    Column vertical calculation:

			8	9
➖			1	5
			7	4

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 67-35
    Solution:
    67-35 = 32
    Column vertical calculation:

			6	7
➖			3	5
			3	2

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 36+5
    Solution:
    36+5 = 41
    Column vertical calculation:

			3	6
➕			1	5
			4	1

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 99+2
    Solution:
    99+2 = 101
    Column vertical calculation:

			9	9
➕		1	1	2
		1	0	1

[5/7 Formula]
    Work: Calculate the value of equation 78.5-5 .
    Question type: Mathematical calculation
    Solution:
          78.5-5
        =73.5
    Answer:78.5-5=73.5
[6/7 Formula]
    Work: Calculate the value of equation 31.3+5 .
    Question type: Mathematical calculation
    Solution:
          31.3+5
        =36.3
    Answer:31.3+5=36.3
[7/7 Formula]
    Work: Calculate the value of equation 6.9+3.5 .
    Question type: Mathematical calculation
    Solution:
          6.9+3.5
        =10.4
    Answer:6.9+3.5=10.4

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>>注：本次最多计算 7 道题。

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