Overview: 7 questions will be solved this time.Among them
           ☆7 integer calculations

[1/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 560+500
    Solution:
    560+500 = 1060
    Column vertical calculation:

			5	6	0
➕		1	5	0	0
		1	0	6	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 580-200
    Solution:
    580-200 = 380
    Column vertical calculation:

			5	8	0
➖			2	0	0
			3	8	0

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 640-400
    Solution:
    640-400 = 240
    Column vertical calculation:

			6	4	0
➖			4	0	0
			2	4	0

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 160+500
    Solution:
    160+500 = 660
    Column vertical calculation:

			1	6	0
➕			5	0	0
			6	6	0

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 620+300
    Solution:
    620+300 = 920
    Column vertical calculation:

			6	2	0
➕			3	0	0
			9	2	0

[6/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 360+600
    Solution:
    360+600 = 960
    Column vertical calculation:

			3	6	0
➕			6	0	0
			9	6	0

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 860-400
    Solution:
    860-400 = 460
    Column vertical calculation:

			8	6	0
➖			4	0	0
			4	6	0

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>>注：本次最多计算 7 道题。

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