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: 94-78
    Solution:
    94-78 = 16
    Column vertical calculation:

			1
			9	4
➖			7	8
			1	6

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 82-16
    Solution:
    82-16 = 66
    Column vertical calculation:

			1
			8	2
➖			1	6
			6	6

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 81-28
    Solution:
    81-28 = 53
    Column vertical calculation:

			1
			8	1
➖			2	8
			5	3

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 88-22
    Solution:
    88-22 = 66
    Column vertical calculation:

			8	8
➖			2	2
			6	6

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 74-34
    Solution:
    74-34 = 40
    Column vertical calculation:

			7	4
➖			3	4
			4	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 92-5
    Solution:
    92-5 = 87
    Column vertical calculation:

			1
			9	2
➖				5
			8	7

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 89-10
    Solution:
    89-10 = 79
    Column vertical calculation:

			8	9
➖			1	0
			7	9

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>>注：本次最多计算 7 道题。

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