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: 86×86
    Solution:
    86×86 = 7396
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 68×82
    Solution:
    68×82 = 5576
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 48×12
    Solution:
    48×12 = 576
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 82×42
    Solution:
    82×42 = 3444
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 28×12
    Solution:
    28×12 = 336
    Column vertical calculation:

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

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 58×21
    Solution:
    58×21 = 1218
    Column vertical calculation:

							5	8
✖							2	1
							5	8
					1	1	6
					1	2	1	8

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 58×81
    Solution:
    58×81 = 4698
    Column vertical calculation:

							5	8
✖							8	1
							5	8
					4	6	4
					4	6	9	8

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>>注：本次最多计算 7 道题。

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