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: 876-448
    Solution:
    876-448 = 428
    Column vertical calculation:

				1
			8	7	6
➖			4	4	8
			4	2	8

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 105-33
    Solution:
    105-33 = 72
    Column vertical calculation:

			1
			1	0	5
➖				3	3
			0	7	2

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 528-362
    Solution:
    528-362 = 166
    Column vertical calculation:

			1
			5	2	8
➖			3	6	2
			1	6	6

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 362-166
    Solution:
    362-166 = 196
    Column vertical calculation:

			1	1
			3	6	2
➖			1	6	6
			1	9	6

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 765-543
    Solution:
    765-543 = 222
    Column vertical calculation:

			7	6	5
➖			5	4	3
			2	2	2

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 345-123
    Solution:
    345-123 = 222
    Column vertical calculation:

			3	4	5
➖			1	2	3
			2	2	2

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 1371-734
    Solution:
    1371-734 = 637
    Column vertical calculation:

			1		1
			1	3	7	1
➖				7	3	4
			0	6	3	7

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>>注：本次最多计算 7 道题。

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