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: 102×50
    Solution:
    102×50 = 5100
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 291×5
    Solution:
    291×5 = 1455
    Column vertical calculation:

						2	9	1
✖								5
					1	4	5	5
					1	4	5	5

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 120÷20
    Solution:
    120÷20 = 6
    Column vertical calculation:

					6
2	0	丿	1	2	0
			1	2	0
					0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 89×30
    Solution:
    89×30 = 2670
    Column vertical calculation:

							8	9
✖							3	0
							0	0
					2	6	7
					2	6	7	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 263×3
    Solution:
    263×3 = 789
    Column vertical calculation:

						2	6	3
✖								3
						7	8	9
						7	8	9

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 680÷17
    Solution:
    680÷17 = 40
    Column vertical calculation:

				4	0
1	7	丿	6	8	0
			6	8
				0	0
					0
					0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 109×30
    Solution:
    109×30 = 3270
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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