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: 74×300
    Solution:
    74×300 = 22200
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 233×30
    Solution:
    233×30 = 6990
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 3500÷140
    Solution:
    3500÷140 = 25
    Column vertical calculation:

						2	5
1	4	0	丿	3	5	0	0
				2	8	0
					7	0	0
					7	0	0
							0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 77×500
    Solution:
    77×500 = 38500
    Column vertical calculation:

								7	7
✖							5	0	0
								0	0
							0	0
					3	8	5
					3	8	5	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 241×50
    Solution:
    241×50 = 12050
    Column vertical calculation:

							2	4	1
✖								5	0
							0	0	0
					1	2	0	5
					1	2	0	5	0

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 3000÷150
    Solution:
    3000÷150 = 20
    Column vertical calculation:

						2	0
1	5	0	丿	3	0	0	0
				3	0	0
						0	0
							0
							0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 20×600
    Solution:
    20×600 = 12000
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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