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: 86×76
    Solution:
    86×76 = 6536
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 78×82
    Solution:
    78×82 = 6396
    Column vertical calculation:

							7	8
✖							8	2
						1	5	6
					6	2	4
					6	3	9	6

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 48×72
    Solution:
    48×72 = 3456
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 82×47
    Solution:
    82×47 = 3854
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 28×17
    Solution:
    28×17 = 476
    Column vertical calculation:

							2	8
✖							1	7
						1	9	6
						2	8
						4	7	6

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 58×27
    Solution:
    58×27 = 1566
    Column vertical calculation:

							5	8
✖							2	7
						4	0	6
					1	1	6
					1	5	6	6

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 57×71
    Solution:
    57×71 = 4047
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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