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+300
    Solution:
    600+300 = 900
    Column vertical calculation:

			6	0	0
➕			3	0	0
			9	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 480-380
    Solution:
    480-380 = 100
    Column vertical calculation:

			4	8	0
➖			3	8	0
			1	0	0

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 460+200
    Solution:
    460+200 = 660
    Column vertical calculation:

			4	6	0
➕			2	0	0
			6	6	0

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 200+300
    Solution:
    200+300 = 500
    Column vertical calculation:

			2	0	0
➕			3	0	0
			5	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 240+60
    Solution:
    240+60 = 300
    Column vertical calculation:

			2	4	0
➕			1	6	0
			3	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 370-30
    Solution:
    370-30 = 340
    Column vertical calculation:

			3	7	0
➖				3	0
			3	4	0

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 500+320
    Solution:
    500+320 = 820
    Column vertical calculation:

			5	0	0
➕			3	2	0
			8	2	0

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>>注：本次最多计算 7 道题。

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