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: 23×72
    Solution:
    23×72 = 1656
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 12×19
    Solution:
    12×19 = 228
    Column vertical calculation:

							1	2
✖							1	9
						1	0	8
						1	2
						2	2	8

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 34×86
    Solution:
    34×86 = 2924
    Column vertical calculation:

							3	4
✖							8	6
						2	0	4
					2	7	2
					2	9	2	4

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 18×27
    Solution:
    18×27 = 486
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 75×16
    Solution:
    75×16 = 1200
    Column vertical calculation:

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

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 13×24
    Solution:
    13×24 = 312
    Column vertical calculation:

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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 35×26
    Solution:
    35×26 = 910
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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