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: 668×400
    Solution:
    668×400 = 267200
    Column vertical calculation:

								6	6	8
✖								4	0	0
								0	0	0
							0	0	0
					2	6	7	2
					2	6	7	2	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 6053×50
    Solution:
    6053×50 = 302650
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 1280÷640
    Solution:
    1280÷640 = 2
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 809×900
    Solution:
    809×900 = 728100
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 8002×40
    Solution:
    8002×40 = 320080
    Column vertical calculation:

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

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 1600÷800
    Solution:
    1600÷800 = 2
    Column vertical calculation:

							2
8	0	0	丿	1	6	0	0
				1	6	0	0
							0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 588×200
    Solution:
    588×200 = 117600
    Column vertical calculation:

								5	8	8
✖								2	0	0
								0	0	0
							0	0	0
					1	1	7	6
					1	1	7	6	0	0

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>>注：本次最多计算 7 道题。

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