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: 700+100
    Solution:
    700+100 = 800
    Column vertical calculation:

			7	0	0
➕			1	0	0
			8	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 580-180
    Solution:
    580-180 = 400
    Column vertical calculation:

			5	8	0
➖			1	8	0
			4	0	0

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 560+400
    Solution:
    560+400 = 960
    Column vertical calculation:

			5	6	0
➕			4	0	0
			9	6	0

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 300+500
    Solution:
    300+500 = 800
    Column vertical calculation:

			3	0	0
➕			5	0	0
			8	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 340+260
    Solution:
    340+260 = 600
    Column vertical calculation:

			3	4	0
➕			21	6	0
			6	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 470-230
    Solution:
    470-230 = 240
    Column vertical calculation:

			4	7	0
➖			2	3	0
			2	4	0

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 600+120
    Solution:
    600+120 = 720
    Column vertical calculation:

			6	0	0
➕			1	2	0
			7	2	0

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>>注：本次最多计算 7 道题。

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