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: 15×60
    Solution:
    15×60 = 900
    Column vertical calculation:

							1	5
✖							6	0
							0	0
						9	0
						9	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 114×2
    Solution:
    114×2 = 228
    Column vertical calculation:

						1	1	4
✖								2
						2	2	8
						2	2	8

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 340÷2
    Solution:
    340÷2 = 170
    Column vertical calculation:

		1	7	0
2	丿	3	4	0
		2
		1	4
		1	4
			0	0
				0
				0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 50×20
    Solution:
    50×20 = 1000
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 184×2
    Solution:
    184×2 = 368
    Column vertical calculation:

						1	8	4
✖								2
						3	6	8
						3	6	8

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 540÷9
    Solution:
    540÷9 = 60
    Column vertical calculation:

			6	0
9	丿	5	4	0
		5	4
			0	0
				0
				0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 80×20
    Solution:
    80×20 = 1600
    Column vertical calculation:

							8	0
✖							2	0
							0	0
					1	6	0
					1	6	0	0

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>>注：本次最多计算 7 道题。

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