Overview: 3 questions will be solved this time.Among them
           ☆3 integer calculations

[1/3 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 220+400
    Solution:
    220+400 = 620
    Column vertical calculation:

			2	2	0
➕			4	0	0
			6	2	0

[2/3 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 360+300
    Solution:
    360+300 = 660
    Column vertical calculation:

			3	6	0
➕			3	0	0
			6	6	0

[3/3 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 200+400
    Solution:
    200+400 = 600
    Column vertical calculation:

			2	0	0
➕			4	0	0
			6	0	0

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