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: 964-436
    Solution:
    964-436 = 528
    Column vertical calculation:

				1
			9	6	4
➖			4	3	6
			5	2	8

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 1064-145
    Solution:
    1064-145 = 919
    Column vertical calculation:

			1		1
			1	0	6	4
➖				1	4	5
			0	9	1	9

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 528-436
    Solution:
    528-436 = 92
    Column vertical calculation:

			1
			5	2	8
➖			4	3	6
			0	9	2

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 651-229
    Solution:
    651-229 = 422
    Column vertical calculation:

				1
			6	5	1
➖			2	2	9
			4	2	2

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 759-478
    Solution:
    759-478 = 281
    Column vertical calculation:

			1
			7	5	9
➖			4	7	8
			2	8	1

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 478-281
    Solution:
    478-281 = 197
    Column vertical calculation:

			1
			4	7	8
➖			2	8	1
			1	9	7

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 4523-1428
    Solution:
    4523-1428 = 3095
    Column vertical calculation:

				1	1
			4	5	2	3
➖			1	4	2	8
			3	0	9	5

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>>注：本次最多计算 7 道题。

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