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: 16×4
    Solution:
    16×4 = 64
    Column vertical calculation:

						1	6
✖							4
						6	4
						6	4

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 40×3
    Solution:
    40×3 = 120
    Column vertical calculation:

						4	0
✖							3
					1	2	0
					1	2	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 11×2
    Solution:
    11×2 = 22
    Column vertical calculation:

						1	1
✖							2
						2	2
						2	2

[4/7 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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 16×40
    Solution:
    16×40 = 640
    Column vertical calculation:

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

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 40×30
    Solution:
    40×30 = 1200
    Column vertical calculation:

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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 11×20
    Solution:
    11×20 = 220
    Column vertical calculation:

							1	1
✖							2	0
							0	0
						2	2
						2	2	0

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>>注：本次最多计算 7 道题。

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