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: 2×543
    Solution:
    2×543 = 1086
    Column vertical calculation:

								2
✖						5	4	3
								6
							8
					1	0
					1	0	8	6

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 886×5
    Solution:
    886×5 = 4430
    Column vertical calculation:

						8	8	6
✖								5
					4	4	3	0
					4	4	3	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 703×3
    Solution:
    703×3 = 2109
    Column vertical calculation:

						7	0	3
✖								3
					2	1	0	9
					2	1	0	9

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 6×858
    Solution:
    6×858 = 5148
    Column vertical calculation:

								6
✖						8	5	8
							4	8
						3	0
					4	8
					5	1	4	8

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 537×3
    Solution:
    537×3 = 1611
    Column vertical calculation:

						5	3	7
✖								3
					1	6	1	1
					1	6	1	1

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 507×4
    Solution:
    507×4 = 2028
    Column vertical calculation:

						5	0	7
✖								4
					2	0	2	8
					2	0	2	8

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 2×399
    Solution:
    2×399 = 798
    Column vertical calculation:

								2
✖						3	9	9
							1	8
						1	8
						6
						7	9	8

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>>注：本次最多计算 7 道题。

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