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

[1/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 88-18
    Solution:
    88-18 = 70
    Column vertical calculation:

			8	8
➖			1	8
			7	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 56-23
    Solution:
    56-23 = 33
    Column vertical calculation:

			5	6
➖			2	3
			3	3

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 95-55
    Solution:
    95-55 = 40
    Column vertical calculation:

			9	5
➖			5	5
			4	0

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 48-37
    Solution:
    48-37 = 11
    Column vertical calculation:

			4	8
➖			3	7
			1	1

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 55-44
    Solution:
    55-44 = 11
    Column vertical calculation:

			5	5
➖			4	4
			1	1

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 76-23
    Solution:
    76-23 = 53
    Column vertical calculation:

			7	6
➖			2	3
			5	3

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 65-60
    Solution:
    65-60 = 5
    Column vertical calculation:

			6	5
➖			6	0
			0	5

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>>注：本次最多计算 7 道题。

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