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: 40×6
    Solution:
    40×6 = 240
    Column vertical calculation:

						4	0
✖							6
					2	4	0
					2	4	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 41×7
    Solution:
    41×7 = 287
    Column vertical calculation:

						4	1
✖							7
					2	8	7
					2	8	7

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 45×7
    Solution:
    45×7 = 315
    Column vertical calculation:

						4	5
✖							7
					3	1	5
					3	1	5

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 60×7
    Solution:
    60×7 = 420
    Column vertical calculation:

						6	0
✖							7
					4	2	0
					4	2	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 50×7
    Solution:
    50×7 = 350
    Column vertical calculation:

						5	0
✖							7
					3	5	0
					3	5	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 51×7
    Solution:
    51×7 = 357
    Column vertical calculation:

						5	1
✖							7
					3	5	7
					3	5	7

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 40×7
    Solution:
    40×7 = 280
    Column vertical calculation:

						4	0
✖							7
					2	8	0
					2	8	0

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>>注：本次最多计算 7 道题。

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