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: 995-775
    Solution:
    995-775 = 220
    Column vertical calculation:

			9	9	5
➖			7	7	5
			2	2	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 985-807
    Solution:
    985-807 = 178
    Column vertical calculation:

				1
			9	8	5
➖			8	0	7
			1	7	8

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 1736-471
    Solution:
    1736-471 = 1265
    Column vertical calculation:

				1
			1	7	3	6
➖				4	7	1
			1	2	6	5

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 945-427
    Solution:
    945-427 = 518
    Column vertical calculation:

				1
			9	4	5
➖			4	2	7
			5	1	8

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 637-270
    Solution:
    637-270 = 367
    Column vertical calculation:

			1
			6	3	7
➖			2	7	0
			3	6	7

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 683-181
    Solution:
    683-181 = 502
    Column vertical calculation:

			6	8	3
➖			1	8	1
			5	0	2

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 903-786
    Solution:
    903-786 = 117
    Column vertical calculation:

			1	1
			9	0	3
➖			7	8	6
			1	1	7

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>>注：本次最多计算 7 道题。

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