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: 600+200
    Solution:
    600+200 = 800
    Column vertical calculation:

			6	0	0
➕			2	0	0
			8	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 480-80
    Solution:
    480-80 = 400
    Column vertical calculation:

			4	8	0
➖				8	0
			4	0	0

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 460+300
    Solution:
    460+300 = 760
    Column vertical calculation:

			4	6	0
➕			3	0	0
			7	6	0

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 200+400
    Solution:
    200+400 = 600
    Column vertical calculation:

			2	0	0
➕			4	0	0
			6	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 240+160
    Solution:
    240+160 = 400
    Column vertical calculation:

			2	4	0
➕			11	6	0
			4	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 370-130
    Solution:
    370-130 = 240
    Column vertical calculation:

			3	7	0
➖			1	3	0
			2	4	0

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 500+20
    Solution:
    500+20 = 520
    Column vertical calculation:

			5	0	0
➕				2	0
			5	2	0

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>>注：本次最多计算 7 道题。

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