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: 41×6
    Solution:
    41×6 = 246
    Column vertical calculation:

						4	1
✖							6
					2	4	6
					2	4	6

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 45×3
    Solution:
    45×3 = 135
    Column vertical calculation:

						4	5
✖							3
					1	3	5
					1	3	5

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 42×6
    Solution:
    42×6 = 252
    Column vertical calculation:

						4	2
✖							6
					2	5	2
					2	5	2

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 53×3
    Solution:
    53×3 = 159
    Column vertical calculation:

						5	3
✖							3
					1	5	9
					1	5	9

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 52×4
    Solution:
    52×4 = 208
    Column vertical calculation:

						5	2
✖							4
					2	0	8
					2	0	8

[6/7 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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 42×2
    Solution:
    42×2 = 84
    Column vertical calculation:

						4	2
✖							2
						8	4
						8	4

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>>注：本次最多计算 7 道题。

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