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

[1/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 112×900
    Solution:
    112×900 = 100800
    Column vertical calculation:

								1	1	2
✖								9	0	0
								0	0	0
							0	0	0
					1	0	0	8
					1	0	0	8	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 1011×50
    Solution:
    1011×50 = 50550
    Column vertical calculation:

							1	0	1	1
✖									5	0
							0	0	0	0
						5	0	5	5
						5	0	5	5	0

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 750÷250
    Solution:
    750÷250 = 3
    Column vertical calculation:

						3
2	5	0	丿	7	5	0
				7	5	0
						0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 204×400
    Solution:
    204×400 = 81600
    Column vertical calculation:

								2	0	4
✖								4	0	0
								0	0	0
							0	0	0
						8	1	6
						8	1	6	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 2009×90
    Solution:
    2009×90 = 180810
    Column vertical calculation:

							2	0	0	9
✖									9	0
							0	0	0	0
					1	8	0	8	1
					1	8	0	8	1	0

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 6900÷300
    Solution:
    6900÷300 = 23
    Column vertical calculation:

						2	3
3	0	0	丿	6	9	0	0
				6	0	0
					9	0	0
					9	0	0
							0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 423×800
    Solution:
    423×800 = 338400
    Column vertical calculation:

								4	2	3
✖								8	0	0
								0	0	0
							0	0	0
					3	3	8	4
					3	3	8	4	0	0

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>>注：本次最多计算 7 道题。

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