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: 53×68
    Solution:
    53×68 = 3604
    Column vertical calculation:

							5	3
✖							6	8
						4	2	4
					3	1	8
					3	6	0	4

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 35×37
    Solution:
    35×37 = 1295
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 87×73
    Solution:
    87×73 = 6351
    Column vertical calculation:

							8	7
✖							7	3
						2	6	1
					6	0	9
					6	3	5	1

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 98×48
    Solution:
    98×48 = 4704
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 75×37
    Solution:
    75×37 = 2775
    Column vertical calculation:

							7	5
✖							3	7
						5	2	5
					2	2	5
					2	7	7	5

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 67×74
    Solution:
    67×74 = 4958
    Column vertical calculation:

							6	7
✖							7	4
						2	6	8
					4	6	9
					4	9	5	8

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 79×86
    Solution:
    79×86 = 6794
    Column vertical calculation:

							7	9
✖							8	6
						4	7	4
					6	3	2
					6	7	9	4

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>>注：本次最多计算 7 道题。

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