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: 67-46
    Solution:
    67-46 = 21
    Column vertical calculation:

			6	7
➖			4	6
			2	1

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 32-11
    Solution:
    32-11 = 21
    Column vertical calculation:

			3	2
➖			1	1
			2	1

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 29-8
    Solution:
    29-8 = 21
    Column vertical calculation:

			2	9
➖				8
			2	1

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 67-5
    Solution:
    67-5 = 62
    Column vertical calculation:

			6	7
➖				5
			6	2

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 39-18
    Solution:
    39-18 = 21
    Column vertical calculation:

			3	9
➖			1	8
			2	1

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 85-24
    Solution:
    85-24 = 61
    Column vertical calculation:

			8	5
➖			2	4
			6	1

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 96-33
    Solution:
    96-33 = 63
    Column vertical calculation:

			9	6
➖			3	3
			6	3

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>>注：本次最多计算 7 道题。

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