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: 12×50
    Solution:
    12×50 = 600
    Column vertical calculation:

							1	2
✖							5	0
							0	0
						6	0
						6	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 40×90
    Solution:
    40×90 = 3600
    Column vertical calculation:

							4	0
✖							9	0
							0	0
					3	6	0
					3	6	0	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 80×500
    Solution:
    80×500 = 40000
    Column vertical calculation:

								8	0
✖							5	0	0
								0	0
							0	0
					4	0	0
					4	0	0	0	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 13×200
    Solution:
    13×200 = 2600
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 12×500
    Solution:
    12×500 = 6000
    Column vertical calculation:

								1	2
✖							5	0	0
								0	0
							0	0
						6	0
						6	0	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 40×900
    Solution:
    40×900 = 36000
    Column vertical calculation:

								4	0
✖							9	0	0
								0	0
							0	0
					3	6	0
					3	6	0	0	0

[7/7 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

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>>注：本次最多计算 7 道题。

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