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: 750×20
    Solution:
    750×20 = 15000
    Column vertical calculation:

							7	5	0
✖								2	0
							0	0	0
					1	5	0	0
					1	5	0	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 234×20
    Solution:
    234×20 = 4680
    Column vertical calculation:

							2	3	4
✖								2	0
							0	0	0
						4	6	8
						4	6	8	0

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 4200÷140
    Solution:
    4200÷140 = 30
    Column vertical calculation:

						3	0
1	4	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: 706×60
    Solution:
    706×60 = 42360
    Column vertical calculation:

							7	0	6
✖								6	0
							0	0	0
					4	2	3	6
					4	2	3	6	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 240×60
    Solution:
    240×60 = 14400
    Column vertical calculation:

							2	4	0
✖								6	0
							0	0	0
					1	4	4	0
					1	4	4	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 1500÷150
    Solution:
    1500÷150 = 10
    Column vertical calculation:

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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 500×20
    Solution:
    500×20 = 10000
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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