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: 108×40
    Solution:
    108×40 = 4320
    Column vertical calculation:

							1	0	8
✖								4	0
							0	0	0
						4	3	2
						4	3	2	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 302×4
    Solution:
    302×4 = 1208
    Column vertical calculation:

						3	0	2
✖								4
					1	2	0	8
					1	2	0	8

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 630÷21
    Solution:
    630÷21 = 30
    Column vertical calculation:

				3	0
2	1	丿	6	3	0
			6	3
				0	0
					0
					0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 103×40
    Solution:
    103×40 = 4120
    Column vertical calculation:

							1	0	3
✖								4	0
							0	0	0
						4	1	2
						4	1	2	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 292×4
    Solution:
    292×4 = 1168
    Column vertical calculation:

						2	9	2
✖								4
					1	1	6	8
					1	1	6	8

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 140÷20
    Solution:
    140÷20 = 7
    Column vertical calculation:

					7
2	0	丿	1	4	0
			1	4	0
					0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 48×40
    Solution:
    48×40 = 1920
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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