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: 59×48
    Solution:
    59×48 = 2832
    Column vertical calculation:

							5	9
✖							4	8
						4	7	2
					2	3	6
					2	8	3	2

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 78×89
    Solution:
    78×89 = 6942
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 64×34
    Solution:
    64×34 = 2176
    Column vertical calculation:

							6	4
✖							3	4
						2	5	6
					1	9	2
					2	1	7	6

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 49×47
    Solution:
    49×47 = 2303
    Column vertical calculation:

							4	9
✖							4	7
						3	4	3
					1	9	6
					2	3	0	3

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 34×43
    Solution:
    34×43 = 1462
    Column vertical calculation:

							3	4
✖							4	3
						1	0	2
					1	3	6
					1	4	6	2

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 49×15
    Solution:
    49×15 = 735
    Column vertical calculation:

							4	9
✖							1	5
						2	4	5
						4	9
						7	3	5

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 73×29
    Solution:
    73×29 = 2117
    Column vertical calculation:

							7	3
✖							2	9
						6	5	7
					1	4	6
					2	1	1	7

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>>注：本次最多计算 7 道题。

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