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: 704×5
    Solution:
    704×5 = 3520
    Column vertical calculation:

						7	0	4
✖								5
					3	5	2	0
					3	5	2	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 392×5
    Solution:
    392×5 = 1960
    Column vertical calculation:

						3	9	2
✖								5
					1	9	6	0
					1	9	6	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 394×3
    Solution:
    394×3 = 1182
    Column vertical calculation:

						3	9	4
✖								3
					1	1	8	2
					1	1	8	2

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 764×4
    Solution:
    764×4 = 3056
    Column vertical calculation:

						7	6	4
✖								4
					3	0	5	6
					3	0	5	6

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 746×2
    Solution:
    746×2 = 1492
    Column vertical calculation:

						7	4	6
✖								2
					1	4	9	2
					1	4	9	2

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 643×4
    Solution:
    643×4 = 2572
    Column vertical calculation:

						6	4	3
✖								4
					2	5	7	2
					2	5	7	2

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 683×5
    Solution:
    683×5 = 3415
    Column vertical calculation:

						6	8	3
✖								5
					3	4	1	5
					3	4	1	5

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>>注：本次最多计算 7 道题。

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