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: 62×77
    Solution:
    62×77 = 4774
    Column vertical calculation:

							6	2
✖							7	7
						4	3	4
					4	3	4
					4	7	7	4

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 18×47
    Solution:
    18×47 = 846
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 36×19
    Solution:
    36×19 = 684
    Column vertical calculation:

							3	6
✖							1	9
						3	2	4
						3	6
						6	8	4

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 57×64
    Solution:
    57×64 = 3648
    Column vertical calculation:

							5	7
✖							6	4
						2	2	8
					3	4	2
					3	6	4	8

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 29×75
    Solution:
    29×75 = 2175
    Column vertical calculation:

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

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 35×98
    Solution:
    35×98 = 3430
    Column vertical calculation:

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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 54×87
    Solution:
    54×87 = 4698
    Column vertical calculation:

							5	4
✖							8	7
						3	7	8
					4	3	2
					4	6	9	8

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>>注：本次最多计算 7 道题。

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