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: 15×8
    Solution:
    15×8 = 120
    Column vertical calculation:

						1	5
✖							8
					1	2	0
					1	2	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 55×8
    Solution:
    55×8 = 440
    Column vertical calculation:

						5	5
✖							8
					4	4	0
					4	4	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 22×8
    Solution:
    22×8 = 176
    Column vertical calculation:

						2	2
✖							8
					1	7	6
					1	7	6

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 29×8
    Solution:
    29×8 = 232
    Column vertical calculation:

						2	9
✖							8
					2	3	2
					2	3	2

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 40×8
    Solution:
    40×8 = 320
    Column vertical calculation:

						4	0
✖							8
					3	2	0
					3	2	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 42×8
    Solution:
    42×8 = 336
    Column vertical calculation:

						4	2
✖							8
					3	3	6
					3	3	6

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 50×8
    Solution:
    50×8 = 400
    Column vertical calculation:

						5	0
✖							8
					4	0	0
					4	0	0

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>>注：本次最多计算 7 道题。

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