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: 24×15
    Solution:
    24×15 = 360
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 45×41
    Solution:
    45×41 = 1845
    Column vertical calculation:

							4	5
✖							4	1
							4	5
					1	8	0
					1	8	4	5

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 45×49
    Solution:
    45×49 = 2205
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 42×94
    Solution:
    42×94 = 3948
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 41×41
    Solution:
    41×41 = 1681
    Column vertical calculation:

							4	1
✖							4	1
							4	1
					1	6	4
					1	6	8	1

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 24×19
    Solution:
    24×19 = 456
    Column vertical calculation:

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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 14×14
    Solution:
    14×14 = 196
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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