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: 51×60
    Solution:
    51×60 = 3060
    Column vertical calculation:

							5	1
✖							6	0
							0	0
					3	0	6
					3	0	6	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 190×6
    Solution:
    190×6 = 1140
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 100÷10
    Solution:
    100÷10 = 10
    Column vertical calculation:

				1	0
1	0	丿	1	0	0
			1	0
				0	0
					0
					0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 72×50
    Solution:
    72×50 = 3600
    Column vertical calculation:

							7	2
✖							5	0
							0	0
					3	6	0
					3	6	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 231×5
    Solution:
    231×5 = 1155
    Column vertical calculation:

						2	3	1
✖								5
					1	1	5	5
					1	1	5	5

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 210÷14
    Solution:
    210÷14 = 15
    Column vertical calculation:

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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 60×20
    Solution:
    60×20 = 1200
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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