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: 39-3
    Solution:
    39-3 = 36
    Column vertical calculation:

			3	9
➖				3
			3	6

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 85-6
    Solution:
    85-6 = 79
    Column vertical calculation:

			1
			8	5
➖				6
			7	9

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 122+2
    Solution:
    122+2 = 124
    Column vertical calculation:

			1	2	2
➕					2
			1	2	4

[4/7 Formula]
    Work: Calculate the value of equation 11.7+5.8 .
    Question type: Mathematical calculation
    Solution:
          11.7+5.8
        =17.5
    Answer:11.7+5.8=17.5
[5/7 Formula]
    Work: Calculate the value of equation 1.8+2.7 .
    Question type: Mathematical calculation
    Solution:
          1.8+2.7
        =4.5
    Answer:1.8+2.7=4.5
[6/7 Formula]
    Work: Calculate the value of equation 3.8+5.9 .
    Question type: Mathematical calculation
    Solution:
          3.8+5.9
        =9.7
    Answer:3.8+5.9=9.7
[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 35-21
    Solution:
    35-21 = 14
    Column vertical calculation:

			3	5
➖			2	1
			1	4

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>>注：本次最多计算 7 道题。

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