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: 476-68
    Solution:
    476-68 = 408
    Column vertical calculation:

				1
			4	7	6
➖				6	8
			4	0	8

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 1214-739
    Solution:
    1214-739 = 475
    Column vertical calculation:

			1	1	1
			1	2	1	4
➖				7	3	9
			0	4	7	5

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 1202-764
    Solution:
    1202-764 = 438
    Column vertical calculation:

			1	1	1
			1	2	0	2
➖				7	6	4
			0	4	3	8

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 1299-437
    Solution:
    1299-437 = 862
    Column vertical calculation:

			1
			1	2	9	9
➖				4	3	7
			0	8	6	2

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 713-478
    Solution:
    713-478 = 235
    Column vertical calculation:

			1	1
			7	1	3
➖			4	7	8
			2	3	5

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 1334-491
    Solution:
    1334-491 = 843
    Column vertical calculation:

			1	1
			1	3	3	4
➖				4	9	1
			0	8	4	3

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 676-373
    Solution:
    676-373 = 303
    Column vertical calculation:

			6	7	6
➖			3	7	3
			3	0	3

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>>注：本次最多计算 7 道题。

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