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+110
    Solution:
    600+110 = 710
    Column vertical calculation:

			6	0	0
➕			1	1	0
			7	1	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 480-170
    Solution:
    480-170 = 310
    Column vertical calculation:

			4	8	0
➖			1	7	0
			3	1	0

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 460+410
    Solution:
    460+410 = 870
    Column vertical calculation:

			4	6	0
➕			4	1	0
			8	7	0

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 200+510
    Solution:
    200+510 = 710
    Column vertical calculation:

			2	0	0
➕			5	1	0
			7	1	0

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 240+250
    Solution:
    240+250 = 490
    Column vertical calculation:

			2	4	0
➕			2	5	0
			4	9	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 370-220
    Solution:
    370-220 = 150
    Column vertical calculation:

			3	7	0
➖			2	2	0
			1	5	0

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 500+110
    Solution:
    500+110 = 610
    Column vertical calculation:

			5	0	0
➕			1	1	0
			6	1	0

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>>注：本次最多计算 7 道题。

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