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: 74-50
    Solution:
    74-50 = 24
    Column vertical calculation:

			7	4
➖			5	0
			2	4

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 88-8
    Solution:
    88-8 = 80
    Column vertical calculation:

			8	8
➖				8
			8	0

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 96-44
    Solution:
    96-44 = 52
    Column vertical calculation:

			9	6
➖			4	4
			5	2

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 45-23
    Solution:
    45-23 = 22
    Column vertical calculation:

			4	5
➖			2	3
			2	2

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 90-60
    Solution:
    90-60 = 30
    Column vertical calculation:

			9	0
➖			6	0
			3	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 98-77
    Solution:
    98-77 = 21
    Column vertical calculation:

			9	8
➖			7	7
			2	1

[7/7 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

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>>注：本次最多计算 7 道题。

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