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+180
    Solution:
    600+180 = 780
    Column vertical calculation:

			6	0	0
➕			1	8	0
			7	8	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 480-260
    Solution:
    480-260 = 220
    Column vertical calculation:

			4	8	0
➖			2	6	0
			2	2	0

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 460+480
    Solution:
    460+480 = 940
    Column vertical calculation:

			4	6	0
➕			41	8	0
			9	4	0

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 200+580
    Solution:
    200+580 = 780
    Column vertical calculation:

			2	0	0
➕			5	8	0
			7	8	0

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 240+340
    Solution:
    240+340 = 580
    Column vertical calculation:

			2	4	0
➕			3	4	0
			5	8	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 370-310
    Solution:
    370-310 = 60
    Column vertical calculation:

			3	7	0
➖			3	1	0
			0	6	0

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 500+210
    Solution:
    500+210 = 710
    Column vertical calculation:

			5	0	0
➕			2	1	0
			7	1	0

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>>注：本次最多计算 7 道题。

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