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: 64×46
    Solution:
    64×46 = 2944
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 67×69
    Solution:
    67×69 = 4623
    Column vertical calculation:

							6	7
✖							6	9
						6	0	3
					4	0	2
					4	6	2	3

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 26×69
    Solution:
    26×69 = 1794
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 76×68
    Solution:
    76×68 = 5168
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 16×69
    Solution:
    16×69 = 1104
    Column vertical calculation:

							1	6
✖							6	9
						1	4	4
						9	6
					1	1	0	4

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 68×67
    Solution:
    68×67 = 4556
    Column vertical calculation:

							6	8
✖							6	7
						4	7	6
					4	0	8
					4	5	5	6

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 36×67
    Solution:
    36×67 = 2412
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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