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: 56+16
    Solution:
    56+16 = 72
    Column vertical calculation:

			5	6
➕			11	6
			7	2

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 88-66
    Solution:
    88-66 = 22
    Column vertical calculation:

			8	8
➖			6	6
			2	2

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 22-12
    Solution:
    22-12 = 10
    Column vertical calculation:

			2	2
➖			1	2
			1	0

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 87-18
    Solution:
    87-18 = 69
    Column vertical calculation:

			1
			8	7
➖			1	8
			6	9

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 62+21
    Solution:
    62+21 = 83
    Column vertical calculation:

			6	2
➕			2	1
			8	3

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 77-27
    Solution:
    77-27 = 50
    Column vertical calculation:

			7	7
➖			2	7
			5	0

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 93-69
    Solution:
    93-69 = 24
    Column vertical calculation:

			1
			9	3
➖			6	9
			2	4

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>>注：本次最多计算 7 道题。

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