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: 42×2
    Solution:
    42×2 = 84
    Column vertical calculation:

						4	2
✖							2
						8	4
						8	4

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 42×3
    Solution:
    42×3 = 126
    Column vertical calculation:

						4	2
✖							3
					1	2	6
					1	2	6

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 42×8
    Solution:
    42×8 = 336
    Column vertical calculation:

						4	2
✖							8
					3	3	6
					3	3	6

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 52×3
    Solution:
    52×3 = 156
    Column vertical calculation:

						5	2
✖							3
					1	5	6
					1	5	6

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 62×2
    Solution:
    62×2 = 124
    Column vertical calculation:

						6	2
✖							2
					1	2	4
					1	2	4

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 62×5
    Solution:
    62×5 = 310
    Column vertical calculation:

						6	2
✖							5
					3	1	0
					3	1	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 50×4
    Solution:
    50×4 = 200
    Column vertical calculation:

						5	0
✖							4
					2	0	0
					2	0	0

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>>注：本次最多计算 7 道题。

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