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: 44×48
    Solution:
    44×48 = 2112
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 74×43
    Solution:
    74×43 = 3182
    Column vertical calculation:

							7	4
✖							4	3
						2	2	2
					2	9	6
					3	1	8	2

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 94×84
    Solution:
    94×84 = 7896
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 41×74
    Solution:
    41×74 = 3034
    Column vertical calculation:

							4	1
✖							7	4
						1	6	4
					2	8	7
					3	0	3	4

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 14×64
    Solution:
    14×64 = 896
    Column vertical calculation:

							1	4
✖							6	4
							5	6
						8	4
						8	9	6

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 42×41
    Solution:
    42×41 = 1722
    Column vertical calculation:

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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 47×43
    Solution:
    47×43 = 2021
    Column vertical calculation:

							4	7
✖							4	3
						1	4	1
					1	8	8
					2	0	2	1

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>>注：本次最多计算 7 道题。

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