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: 130-120
    Solution:
    130-120 = 10
    Column vertical calculation:

			1	3	0
➖			1	2	0
			0	1	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 150-150
    Solution:
    150-150 = 0
    Column vertical calculation:

			1	5	0
➖			1	5	0
			0	0	0

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 140-140
    Solution:
    140-140 = 0
    Column vertical calculation:

			1	4	0
➖			1	4	0
			0	0	0

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 120-120
    Solution:
    120-120 = 0
    Column vertical calculation:

			1	2	0
➖			1	2	0
			0	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 360-120
    Solution:
    360-120 = 240
    Column vertical calculation:

			3	6	0
➖			1	2	0
			2	4	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 360-160
    Solution:
    360-160 = 200
    Column vertical calculation:

			3	6	0
➖			1	6	0
			2	0	0

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 360-140
    Solution:
    360-140 = 220
    Column vertical calculation:

			3	6	0
➖			1	4	0
			2	2	0

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>>注：本次最多计算 7 道题。

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