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: 54×36
    Solution:
    54×36 = 1944
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 65×59
    Solution:
    65×59 = 3835
    Column vertical calculation:

							6	5
✖							5	9
						5	8	5
					3	2	5
					3	8	3	5

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 25×59
    Solution:
    25×59 = 1475
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 75×65
    Solution:
    75×65 = 4875
    Column vertical calculation:

							7	5
✖							6	5
						3	7	5
					4	5	0
					4	8	7	5

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 15×59
    Solution:
    15×59 = 885
    Column vertical calculation:

							1	5
✖							5	9
						1	3	5
						7	5
						8	8	5

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 58×57
    Solution:
    58×57 = 3306
    Column vertical calculation:

							5	8
✖							5	7
						4	0	6
					2	9	0
					3	3	0	6

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 35×57
    Solution:
    35×57 = 1995
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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