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: 95-15
    Solution:
    95-15 = 80
    Column vertical calculation:

			9	5
➖			1	5
			8	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 34-16
    Solution:
    34-16 = 18
    Column vertical calculation:

			1
			3	4
➖			1	6
			1	8

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 76-49
    Solution:
    76-49 = 27
    Column vertical calculation:

			1
			7	6
➖			4	9
			2	7

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 18-5
    Solution:
    18-5 = 13
    Column vertical calculation:

			1	8
➖				5
			1	3

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 41-13
    Solution:
    41-13 = 28
    Column vertical calculation:

			1
			4	1
➖			1	3
			2	8

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 49-21
    Solution:
    49-21 = 28
    Column vertical calculation:

			4	9
➖			2	1
			2	8

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 45-30
    Solution:
    45-30 = 15
    Column vertical calculation:

			4	5
➖			3	0
			1	5

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>>注：本次最多计算 7 道题。

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