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: 956×400
    Solution:
    956×400 = 382400
    Column vertical calculation:

								9	5	6
✖								4	0	0
								0	0	0
							0	0	0
					3	8	2	4
					3	8	2	4	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 9058×30
    Solution:
    9058×30 = 271740
    Column vertical calculation:

							9	0	5	8
✖									3	0
							0	0	0	0
					2	7	1	7	4
					2	7	1	7	4	0

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 840÷420
    Solution:
    840÷420 = 2
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 787×300
    Solution:
    787×300 = 236100
    Column vertical calculation:

								7	8	7
✖								3	0	0
								0	0	0
							0	0	0
					2	3	6	1
					2	3	6	1	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 7087×20
    Solution:
    7087×20 = 141740
    Column vertical calculation:

							7	0	8	7
✖									2	0
							0	0	0	0
					1	4	1	7	4
					1	4	1	7	4	0

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 8640÷720
    Solution:
    8640÷720 = 12
    Column vertical calculation:

						1	2
7	2	0	丿	8	6	4	0
				7	2	0
				1	4	4	0
				1	4	4	0
							0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 311×900
    Solution:
    311×900 = 279900
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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