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: 409×400
    Solution:
    409×400 = 163600
    Column vertical calculation:

								4	0	9
✖								4	0	0
								0	0	0
							0	0	0
					1	6	3	6
					1	6	3	6	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 3099×20
    Solution:
    3099×20 = 61980
    Column vertical calculation:

							3	0	9	9
✖									2	0
							0	0	0	0
						6	1	9	8
						6	1	9	8	0

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 7200÷450
    Solution:
    7200÷450 = 16
    Column vertical calculation:

						1	6
4	5	0	丿	7	2	0	0
				4	5	0
				2	7	0	0
				2	7	0	0
							0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 124×800
    Solution:
    124×800 = 99200
    Column vertical calculation:

								1	2	4
✖								8	0	0
								0	0	0
							0	0	0
						9	9	2
						9	9	2	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 1023×60
    Solution:
    1023×60 = 61380
    Column vertical calculation:

							1	0	2	3
✖									6	0
							0	0	0	0
						6	1	3	8
						6	1	3	8	0

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 1250÷250
    Solution:
    1250÷250 = 5
    Column vertical calculation:

							5
2	5	0	丿	1	2	5	0
				1	2	5	0
							0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 296×300
    Solution:
    296×300 = 88800
    Column vertical calculation:

								2	9	6
✖								3	0	0
								0	0	0
							0	0	0
						8	8	8
						8	8	8	0	0

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>>注：本次最多计算 7 道题。

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