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

[1/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 46+16
    Solution:
    46+16 = 62
    Column vertical calculation:

			4	6
➕			11	6
			6	2

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 78-66
    Solution:
    78-66 = 12
    Column vertical calculation:

			7	8
➖			6	6
			1	2

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 12-12
    Solution:
    12-12 = 0
    Column vertical calculation:

			1	2
➖			1	2
			0	0

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 77-18
    Solution:
    77-18 = 59
    Column vertical calculation:

			1
			7	7
➖			1	8
			5	9

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 52+21
    Solution:
    52+21 = 73
    Column vertical calculation:

			5	2
➕			2	1
			7	3

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 67-27
    Solution:
    67-27 = 40
    Column vertical calculation:

			6	7
➖			2	7
			4	0

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 83-69
    Solution:
    83-69 = 14
    Column vertical calculation:

			1
			8	3
➖			6	9
			1	4

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>>注：本次最多计算 7 道题。

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