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+190
    Solution:
    600+190 = 790
    Column vertical calculation:

			6	0	0
➕			1	9	0
			7	9	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 480-270
    Solution:
    480-270 = 210
    Column vertical calculation:

			4	8	0
➖			2	7	0
			2	1	0

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 460+490
    Solution:
    460+490 = 950
    Column vertical calculation:

			4	6	0
➕			41	9	0
			9	5	0

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 200+590
    Solution:
    200+590 = 790
    Column vertical calculation:

			2	0	0
➕			5	9	0
			7	9	0

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 240+350
    Solution:
    240+350 = 590
    Column vertical calculation:

			2	4	0
➕			3	5	0
			5	9	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 370-320
    Solution:
    370-320 = 50
    Column vertical calculation:

			3	7	0
➖			3	2	0
			0	5	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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