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: 65×57
    Solution:
    65×57 = 3705
    Column vertical calculation:

							6	5
✖							5	7
						4	5	5
					3	2	5
					3	7	0	5

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 70×63
    Solution:
    70×63 = 4410
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 44×66
    Solution:
    44×66 = 2904
    Column vertical calculation:

							4	4
✖							6	6
						2	6	4
					2	6	4
					2	9	0	4

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 90×64
    Solution:
    90×64 = 5760
    Column vertical calculation:

							9	0
✖							6	4
						3	6	0
					5	4	0
					5	7	6	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 59×37
    Solution:
    59×37 = 2183
    Column vertical calculation:

							5	9
✖							3	7
						4	1	3
					1	7	7
					2	1	8	3

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 46×88
    Solution:
    46×88 = 4048
    Column vertical calculation:

							4	6
✖							8	8
						3	6	8
					3	6	8
					4	0	4	8

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 35×48
    Solution:
    35×48 = 1680
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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