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: 87×17
    Solution:
    87×17 = 1479
    Column vertical calculation:

							8	7
✖							1	7
						6	0	9
						8	7
					1	4	7	9

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 17×87
    Solution:
    17×87 = 1479
    Column vertical calculation:

							1	7
✖							8	7
						1	1	9
					1	3	6
					1	4	7	9

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 18×74
    Solution:
    18×74 = 1332
    Column vertical calculation:

							1	8
✖							7	4
							7	2
					1	2	6
					1	3	3	2

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 38×71
    Solution:
    38×71 = 2698
    Column vertical calculation:

							3	8
✖							7	1
							3	8
					2	6	6
					2	6	9	8

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 17×84
    Solution:
    17×84 = 1428
    Column vertical calculation:

							1	7
✖							8	4
							6	8
					1	3	6
					1	4	2	8

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 48×71
    Solution:
    48×71 = 3408
    Column vertical calculation:

							4	8
✖							7	1
							4	8
					3	3	6
					3	4	0	8

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 17×32
    Solution:
    17×32 = 544
    Column vertical calculation:

							1	7
✖							3	2
							3	4
						5	1
						5	4	4

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>>注：本次最多计算 7 道题。

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