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: 8×405
    Solution:
    8×405 = 3240
    Column vertical calculation:

								8
✖						4	0	5
							4	0
							0
					3	2
					3	2	4	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 314×2
    Solution:
    314×2 = 628
    Column vertical calculation:

						3	1	4
✖								2
						6	2	8
						6	2	8

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 507×6
    Solution:
    507×6 = 3042
    Column vertical calculation:

						5	0	7
✖								6
					3	0	4	2
					3	0	4	2

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 9×904
    Solution:
    9×904 = 8136
    Column vertical calculation:

								9
✖						9	0	4
							3	6
							0
					8	1
					8	1	3	6

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 6×276
    Solution:
    6×276 = 1656
    Column vertical calculation:

								6
✖						2	7	6
							3	6
						4	2
					1	2
					1	6	5	6

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 988×7
    Solution:
    988×7 = 6916
    Column vertical calculation:

						9	8	8
✖								7
					6	9	1	6
					6	9	1	6

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 258×6
    Solution:
    258×6 = 1548
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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