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: 84×17
    Solution:
    84×17 = 1428
    Column vertical calculation:

							8	4
✖							1	7
						5	8	8
						8	4
					1	4	2	8

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 11×87
    Solution:
    11×87 = 957
    Column vertical calculation:

							1	1
✖							8	7
							7	7
						8	8
						9	5	7

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 18×24
    Solution:
    18×24 = 432
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 38×21
    Solution:
    38×21 = 798
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 16×84
    Solution:
    16×84 = 1344
    Column vertical calculation:

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

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 84×31
    Solution:
    84×31 = 2604
    Column vertical calculation:

							8	4
✖							3	1
							8	4
					2	5	2
					2	6	0	4

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 18×32
    Solution:
    18×32 = 576
    Column vertical calculation:

							1	8
✖							3	2
							3	6
						5	4
						5	7	6

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>>注：本次最多计算 7 道题。

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