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: 24×3
    Solution:
    24×3 = 72
    Column vertical calculation:

						2	4
✖							3
						7	2
						7	2

[2/7 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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 14×3
    Solution:
    14×3 = 42
    Column vertical calculation:

						1	4
✖							3
						4	2
						4	2

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 14×4
    Solution:
    14×4 = 56
    Column vertical calculation:

						1	4
✖							4
						5	6
						5	6

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 24×30
    Solution:
    24×30 = 720
    Column vertical calculation:

							2	4
✖							3	0
							0	0
						7	2
						7	2	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 62×20
    Solution:
    62×20 = 1240
    Column vertical calculation:

							6	2
✖							2	0
							0	0
					1	2	4
					1	2	4	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 14×30
    Solution:
    14×30 = 420
    Column vertical calculation:

							1	4
✖							3	0
							0	0
						4	2
						4	2	0

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>>注：本次最多计算 7 道题。

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