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: 35×20
    Solution:
    35×20 = 700
    Column vertical calculation:

							3	5
✖							2	0
							0	0
						7	0
						7	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 154×2
    Solution:
    154×2 = 308
    Column vertical calculation:

						1	5	4
✖								2
						3	0	8
						3	0	8

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 240÷6
    Solution:
    240÷6 = 40
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 98×40
    Solution:
    98×40 = 3920
    Column vertical calculation:

							9	8
✖							4	0
							0	0
					3	9	2
					3	9	2	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 282×4
    Solution:
    282×4 = 1128
    Column vertical calculation:

						2	8	2
✖								4
					1	1	2	8
					1	1	2	8

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 570÷19
    Solution:
    570÷19 = 30
    Column vertical calculation:

				3	0
1	9	丿	5	7	0
			5	7
				0	0
					0
					0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 85×20
    Solution:
    85×20 = 1700
    Column vertical calculation:

							8	5
✖							2	0
							0	0
					1	7	0
					1	7	0	0

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>>注：本次最多计算 7 道题。

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