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: 380×5
    Solution:
    380×5 = 1900
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 460×7
    Solution:
    460×7 = 3220
    Column vertical calculation:

						4	6	0
✖								7
					3	2	2	0
					3	2	2	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 342×5
    Solution:
    342×5 = 1710
    Column vertical calculation:

						3	4	2
✖								5
					1	7	1	0
					1	7	1	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 123×2
    Solution:
    123×2 = 246
    Column vertical calculation:

						1	2	3
✖								2
						2	4	6
						2	4	6

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 396×4
    Solution:
    396×4 = 1584
    Column vertical calculation:

						3	9	6
✖								4
					1	5	8	4
					1	5	8	4

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 657×7
    Solution:
    657×7 = 4599
    Column vertical calculation:

						6	5	7
✖								7
					4	5	9	9
					4	5	9	9

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 116×5
    Solution:
    116×5 = 580
    Column vertical calculation:

						1	1	6
✖								5
						5	8	0
						5	8	0

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>>注：本次最多计算 7 道题。

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