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: 23×2
    Solution:
    23×2 = 46
    Column vertical calculation:

						2	3
✖							2
						4	6
						4	6

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 45×6
    Solution:
    45×6 = 270
    Column vertical calculation:

						4	5
✖							6
					2	7	0
					2	7	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 36×2
    Solution:
    36×2 = 72
    Column vertical calculation:

						3	6
✖							2
						7	2
						7	2

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 36×3
    Solution:
    36×3 = 108
    Column vertical calculation:

						3	6
✖							3
					1	0	8
					1	0	8

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 23×20
    Solution:
    23×20 = 460
    Column vertical calculation:

							2	3
✖							2	0
							0	0
						4	6
						4	6	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 45×60
    Solution:
    45×60 = 2700
    Column vertical calculation:

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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 36×20
    Solution:
    36×20 = 720
    Column vertical calculation:

							3	6
✖							2	0
							0	0
						7	2
						7	2	0

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>>注：本次最多计算 7 道题。

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