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: 48×68
    Solution:
    48×68 = 3264
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 72×89
    Solution:
    72×89 = 6408
    Column vertical calculation:

							7	2
✖							8	9
						6	4	8
					5	7	6
					6	4	0	8

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 45×61
    Solution:
    45×61 = 2745
    Column vertical calculation:

							4	5
✖							6	1
							4	5
					2	7	0
					2	7	4	5

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 18×45
    Solution:
    18×45 = 810
    Column vertical calculation:

							1	8
✖							4	5
							9	0
						7	2
						8	1	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 79×86
    Solution:
    79×86 = 6794
    Column vertical calculation:

							7	9
✖							8	6
						4	7	4
					6	3	2
					6	7	9	4

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 33×51
    Solution:
    33×51 = 1683
    Column vertical calculation:

							3	3
✖							5	1
							3	3
					1	6	5
					1	6	8	3

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 36×27
    Solution:
    36×27 = 972
    Column vertical calculation:

							3	6
✖							2	7
						2	5	2
						7	2
						9	7	2

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>>注：本次最多计算 7 道题。

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