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

[1/3 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 1060×60
    Solution:
    1060×60 = 63600
    Column vertical calculation:

							1	0	6	0
✖									6	0
							0	0	0	0
						6	3	6	0
						6	3	6	0	0

[2/3 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 300×60
    Solution:
    300×60 = 18000
    Column vertical calculation:

							3	0	0
✖								6	0
							0	0	0
					1	8	0	0
					1	8	0	0	0

[3/3 Integer column vertical calculation]
    Question type: Integer division
    Original question: 2100÷210
    Solution:
    2100÷210 = 10
    Column vertical calculation:

						1	0
2	1	0	丿	2	1	0	0
				2	1	0
						0	0
							0
							0

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