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: 107×500
    Solution:
    107×500 = 53500
    Column vertical calculation:

								1	0	7
✖								5	0	0
								0	0	0
							0	0	0
						5	3	5
						5	3	5	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 301×50
    Solution:
    301×50 = 15050
    Column vertical calculation:

							3	0	1
✖								5	0
							0	0	0
					1	5	0	5
					1	5	0	5	0

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 4200÷210
    Solution:
    4200÷210 = 20
    Column vertical calculation:

						2	0
2	1	0	丿	4	2	0	0
				4	2	0
						0	0
							0
							0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 94×300
    Solution:
    94×300 = 28200
    Column vertical calculation:

								9	4
✖							3	0	0
								0	0
							0	0
					2	8	2
					2	8	2	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 273×30
    Solution:
    273×30 = 8190
    Column vertical calculation:

							2	7	3
✖								3	0
							0	0	0
						8	1	9
						8	1	9	0

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 4500÷180
    Solution:
    4500÷180 = 25
    Column vertical calculation:

						2	5
1	8	0	丿	4	5	0	0
				3	6	0
					9	0	0
					9	0	0
							0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 63×40
    Solution:
    63×40 = 2520
    Column vertical calculation:

							6	3
✖							4	0
							0	0
					2	5	2
					2	5	2	0

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>>注：本次最多计算 7 道题。

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