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: 134×7
    Solution:
    134×7 = 938
    Column vertical calculation:

						1	3	4
✖								7
						9	3	8
						9	3	8

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 412×6
    Solution:
    412×6 = 2472
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 2×415
    Solution:
    2×415 = 830
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 3×921
    Solution:
    3×921 = 2763
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 533×4
    Solution:
    533×4 = 2132
    Column vertical calculation:

						5	3	3
✖								4
					2	1	3	2
					2	1	3	2

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 4×687
    Solution:
    4×687 = 2748
    Column vertical calculation:

								4
✖						6	8	7
							2	8
						3	2
					2	4
					2	7	4	8

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 285×7
    Solution:
    285×7 = 1995
    Column vertical calculation:

						2	8	5
✖								7
					1	9	9	5
					1	9	9	5

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>>注：本次最多计算 7 道题。

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