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: 41×2
    Solution:
    41×2 = 82
    Column vertical calculation:

						4	1
✖							2
						8	2
						8	2

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 2×60
    Solution:
    2×60 = 120
    Column vertical calculation:

							2
✖						6	0
							0
					1	2
					1	2	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 40×9
    Solution:
    40×9 = 360
    Column vertical calculation:

						4	0
✖							9
					3	6	0
					3	6	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 44×9
    Solution:
    44×9 = 396
    Column vertical calculation:

						4	4
✖							9
					3	9	6
					3	9	6

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 41×5
    Solution:
    41×5 = 205
    Column vertical calculation:

						4	1
✖							5
					2	0	5
					2	0	5

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 35×2
    Solution:
    35×2 = 70
    Column vertical calculation:

						3	5
✖							2
						7	0
						7	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 41×3
    Solution:
    41×3 = 123
    Column vertical calculation:

						4	1
✖							3
					1	2	3
					1	2	3

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>>注：本次最多计算 7 道题。

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