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: 696-266
    Solution:
    696-266 = 430
    Column vertical calculation:

			6	9	6
➖			2	6	6
			4	3	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 856-213
    Solution:
    856-213 = 643
    Column vertical calculation:

			8	5	6
➖			2	1	3
			6	4	3

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 556-228
    Solution:
    556-228 = 328
    Column vertical calculation:

				1
			5	5	6
➖			2	2	8
			3	2	8

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 726-501
    Solution:
    726-501 = 225
    Column vertical calculation:

			7	2	6
➖			5	0	1
			2	2	5

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 768-250
    Solution:
    768-250 = 518
    Column vertical calculation:

			7	6	8
➖			2	5	0
			5	1	8

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 867-387
    Solution:
    867-387 = 480
    Column vertical calculation:

			1
			8	6	7
➖			3	8	7
			4	8	0

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 711-217
    Solution:
    711-217 = 494
    Column vertical calculation:

			1	1
			7	1	1
➖			2	1	7
			4	9	4

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>>注：本次最多计算 7 道题。

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