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: 660+100
    Solution:
    660+100 = 760
    Column vertical calculation:

			6	6	0
➕			1	0	0
			7	6	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 540-180
    Solution:
    540-180 = 360
    Column vertical calculation:

			1
			5	4	0
➖			1	8	0
			3	6	0

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 520+400
    Solution:
    520+400 = 920
    Column vertical calculation:

			5	2	0
➕			4	0	0
			9	2	0

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 260+500
    Solution:
    260+500 = 760
    Column vertical calculation:

			2	6	0
➕			5	0	0
			7	6	0

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 300+260
    Solution:
    300+260 = 560
    Column vertical calculation:

			3	0	0
➕			2	6	0
			5	6	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 430-230
    Solution:
    430-230 = 200
    Column vertical calculation:

			4	3	0
➖			2	3	0
			2	0	0

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 560+120
    Solution:
    560+120 = 680
    Column vertical calculation:

			5	6	0
➕			1	2	0
			6	8	0

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>>注：本次最多计算 7 道题。

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