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: 50×40
    Solution:
    50×40 = 2000
    Column vertical calculation:

							5	0
✖							4	0
							0	0
					2	0	0
					2	0	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 24×40
    Solution:
    24×40 = 960
    Column vertical calculation:

							2	4
✖							4	0
							0	0
						9	6
						9	6	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 31×200
    Solution:
    31×200 = 6200
    Column vertical calculation:

								3	1
✖							2	0	0
								0	0
							0	0
						6	2
						6	2	0	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 51×200
    Solution:
    51×200 = 10200
    Column vertical calculation:

								5	1
✖							2	0	0
								0	0
							0	0
					1	0	2
					1	0	2	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 50×400
    Solution:
    50×400 = 20000
    Column vertical calculation:

								5	0
✖							4	0	0
								0	0
							0	0
					2	0	0
					2	0	0	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 24×400
    Solution:
    24×400 = 9600
    Column vertical calculation:

								2	4
✖							4	0	0
								0	0
							0	0
						9	6
						9	6	0	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 41×1
    Solution:
    41×1 = 41
    Column vertical calculation:

						4	1
✖							1
						4	1
						4	1

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>>注：本次最多计算 7 道题。

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