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: 12×300
    Solution:
    12×300 = 3600
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 111×50
    Solution:
    111×50 = 5550
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 1600÷20
    Solution:
    1600÷20 = 80
    Column vertical calculation:

					8	0
2	0	丿	1	6	0	0
			1	6	0
					0	0
						0
						0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 109×50
    Solution:
    109×50 = 5450
    Column vertical calculation:

							1	0	9
✖								5	0
							0	0	0
						5	4	5
						5	4	5	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 123×30
    Solution:
    123×30 = 3690
    Column vertical calculation:

							1	2	3
✖								3	0
							0	0	0
						3	6	9
						3	6	9	0

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 2100÷30
    Solution:
    2100÷30 = 70
    Column vertical calculation:

					7	0
3	0	丿	2	1	0	0
			2	1	0
					0	0
						0
						0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 106×60
    Solution:
    106×60 = 6360
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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