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: 505*6
    Solution:
    505*6 = 3030
    Column vertical calculation:

						5	0	5
✖								6
					3	0	3	0
					3	0	3	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 711*4
    Solution:
    711*4 = 2844
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 456*4
    Solution:
    456*4 = 1824
    Column vertical calculation:

						4	5	6
✖								4
					1	8	2	4
					1	8	2	4

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 470*3
    Solution:
    470*3 = 1410
    Column vertical calculation:

						4	7	0
✖								3
					1	4	1	0
					1	4	1	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 396*5
    Solution:
    396*5 = 1980
    Column vertical calculation:

						3	9	6
✖								5
					1	9	8	0
					1	9	8	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 967*7
    Solution:
    967*7 = 6769
    Column vertical calculation:

						9	6	7
✖								7
					6	7	6	9
					6	7	6	9

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 360*4
    Solution:
    360*4 = 1440
    Column vertical calculation:

						3	6	0
✖								4
					1	4	4	0
					1	4	4	0

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>>注：本次最多计算 7 道题。

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