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: 12×2
    Solution:
    12×2 = 24
    Column vertical calculation:

						1	2
✖							2
						2	4
						2	4

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 10×2
    Solution:
    10×2 = 20
    Column vertical calculation:

						1	0
✖							2
						2	0
						2	0

[3/7 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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 60×4
    Solution:
    60×4 = 240
    Column vertical calculation:

						6	0
✖							4
					2	4	0
					2	4	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 12×5
    Solution:
    12×5 = 60
    Column vertical calculation:

						1	2
✖							5
						6	0
						6	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 60×5
    Solution:
    60×5 = 300
    Column vertical calculation:

						6	0
✖							5
					3	0	0
					3	0	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 1×70
    Solution:
    1×70 = 70
    Column vertical calculation:

							1
✖						7	0
							0
						7
						7	0

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>>注：本次最多计算 7 道题。

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