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: 89-78
    Solution:
    89-78 = 11
    Column vertical calculation:

			8	9
➖			7	8
			1	1

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 97-16
    Solution:
    97-16 = 81
    Column vertical calculation:

			9	7
➖			1	6
			8	1

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 96-28
    Solution:
    96-28 = 68
    Column vertical calculation:

			1
			9	6
➖			2	8
			6	8

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 83-22
    Solution:
    83-22 = 61
    Column vertical calculation:

			8	3
➖			2	2
			6	1

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 69-34
    Solution:
    69-34 = 35
    Column vertical calculation:

			6	9
➖			3	4
			3	5

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 87-5
    Solution:
    87-5 = 82
    Column vertical calculation:

			8	7
➖				5
			8	2

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 98-10
    Solution:
    98-10 = 88
    Column vertical calculation:

			9	8
➖			1	0
			8	8

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>>注：本次最多计算 7 道题。

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