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: 509×30
    Solution:
    509×30 = 15270
    Column vertical calculation:

							5	0	9
✖								3	0
							0	0	0
					1	5	2	7
					1	5	2	7	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 203×30
    Solution:
    203×30 = 6090
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 4400÷110
    Solution:
    4400÷110 = 40
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 45×200
    Solution:
    45×200 = 9000
    Column vertical calculation:

								4	5
✖							2	0	0
								0	0
							0	0
						9	0
						9	0	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 174×20
    Solution:
    174×20 = 3480
    Column vertical calculation:

							1	7	4
✖								2	0
							0	0	0
						3	4	8
						3	4	8	0

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 2800÷80
    Solution:
    2800÷80 = 35
    Column vertical calculation:

					3	5
8	0	丿	2	8	0	0
			2	4	0
				4	0	0
				4	0	0
						0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 208×40
    Solution:
    208×40 = 8320
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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