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: 81×76
    Solution:
    81×76 = 6156
    Column vertical calculation:

							8	1
✖							7	6
						4	8	6
					5	6	7
					6	1	5	6

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 38×36
    Solution:
    38×36 = 1368
    Column vertical calculation:

							3	8
✖							3	6
						2	2	8
					1	1	4
					1	3	6	8

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 73×65
    Solution:
    73×65 = 4745
    Column vertical calculation:

							7	3
✖							6	5
						3	6	5
					4	3	8
					4	7	4	5

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 71×82
    Solution:
    71×82 = 5822
    Column vertical calculation:

							7	1
✖							8	2
						1	4	2
					5	6	8
					5	8	2	2

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 76×37
    Solution:
    76×37 = 2812
    Column vertical calculation:

							7	6
✖							3	7
						5	3	2
					2	2	8
					2	8	1	2

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 36×40
    Solution:
    36×40 = 1440
    Column vertical calculation:

							3	6
✖							4	0
							0	0
					1	4	4
					1	4	4	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 31×96
    Solution:
    31×96 = 2976
    Column vertical calculation:

							3	1
✖							9	6
						1	8	6
					2	7	9
					2	9	7	6

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>>注：本次最多计算 7 道题。

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