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: 5×604
    Solution:
    5×604 = 3020
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 735×3
    Solution:
    735×3 = 2205
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 681×2
    Solution:
    681×2 = 1362
    Column vertical calculation:

						6	8	1
✖								2
					1	3	6	2
					1	3	6	2

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 670×8
    Solution:
    670×8 = 5360
    Column vertical calculation:

						6	7	0
✖								8
					5	3	6	0
					5	3	6	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 817×9
    Solution:
    817×9 = 7353
    Column vertical calculation:

						8	1	7
✖								9
					7	3	5	3
					7	3	5	3

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 423×4
    Solution:
    423×4 = 1692
    Column vertical calculation:

						4	2	3
✖								4
					1	6	9	2
					1	6	9	2

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 324×9
    Solution:
    324×9 = 2916
    Column vertical calculation:

						3	2	4
✖								9
					2	9	1	6
					2	9	1	6

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>>注：本次最多计算 7 道题。

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