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: 33×40
    Solution:
    33×40 = 1320
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 152×4
    Solution:
    152×4 = 608
    Column vertical calculation:

						1	5	2
✖								4
						6	0	8
						6	0	8

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 180÷6
    Solution:
    180÷6 = 30
    Column vertical calculation:

			3	0
6	丿	1	8	0
		1	8
			0	0
				0
				0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 40×20
    Solution:
    40×20 = 800
    Column vertical calculation:

							4	0
✖							2	0
							0	0
						8	0
						8	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 164×2
    Solution:
    164×2 = 328
    Column vertical calculation:

						1	6	4
✖								2
						3	2	8
						3	2	8

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 420÷7
    Solution:
    420÷7 = 60
    Column vertical calculation:

			6	0
7	丿	4	2	0
		4	2
			0	0
				0
				0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 84×30
    Solution:
    84×30 = 2520
    Column vertical calculation:

							8	4
✖							3	0
							0	0
					2	5	2
					2	5	2	0

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>>注：本次最多计算 7 道题。

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