Overview: 7 questions will be solved this time.Among them
           ☆7 integer calculations

[1/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 800-200
    Solution:
    800-200 = 600
    Column vertical calculation:

			8	0	0
➖			2	0	0
			6	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 780-80
    Solution:
    780-80 = 700
    Column vertical calculation:

			7	8	0
➖				8	0
			7	0	0

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 540-200
    Solution:
    540-200 = 340
    Column vertical calculation:

			5	4	0
➖			2	0	0
			3	4	0

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 600+50
    Solution:
    600+50 = 650
    Column vertical calculation:

			6	0	0
➕				5	0
			6	5	0

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 480-180
    Solution:
    480-180 = 300
    Column vertical calculation:

			4	8	0
➖			1	8	0
			3	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 760+300
    Solution:
    760+300 = 1060
    Column vertical calculation:

			7	6	0
➕		1	3	0	0
		1	0	6	0

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 800+300
    Solution:
    800+300 = 1100
    Column vertical calculation:

			8	0	0
➕		1	3	0	0
		1	1	0	0

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>>注：本次最多计算 7 道题。

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