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: 932×600
    Solution:
    932×600 = 559200
    Column vertical calculation:

								9	3	2
✖								6	0	0
								0	0	0
							0	0	0
					5	5	9	2
					5	5	9	2	0	0

[2/3 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 9031×90
    Solution:
    9031×90 = 812790
    Column vertical calculation:

							9	0	3	1
✖									9	0
							0	0	0	0
					8	1	2	7	9
					8	1	2	7	9	0

[3/3 Integer column vertical calculation]
    Question type: Integer division
    Original question: 2880÷240
    Solution:
    2880÷240 = 12
    Column vertical calculation:

						1	2
2	4	0	丿	2	8	8	0
				2	4	0
					4	8	0
					4	8	0
							0

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