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: 103×7
    Solution:
    103×7 = 721
    Column vertical calculation:

						1	0	3
✖								7
						7	2	1
						7	2	1

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 440×6
    Solution:
    440×6 = 2640
    Column vertical calculation:

						4	4	0
✖								6
					2	6	4	0
					2	6	4	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 2×418
    Solution:
    2×418 = 836
    Column vertical calculation:

								2
✖						4	1	8
							1	6
							2
						8
						8	3	6

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 3×906
    Solution:
    3×906 = 2718
    Column vertical calculation:

								3
✖						9	0	6
							1	8
							0
					2	7
					2	7	1	8

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 548×4
    Solution:
    548×4 = 2192
    Column vertical calculation:

						5	4	8
✖								4
					2	1	9	2
					2	1	9	2

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 4×671
    Solution:
    4×671 = 2684
    Column vertical calculation:

								4
✖						6	7	1
								4
						2	8
					2	4
					2	6	8	4

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 282×7
    Solution:
    282×7 = 1974
    Column vertical calculation:

						2	8	2
✖								7
					1	9	7	4
					1	9	7	4

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>>注：本次最多计算 7 道题。

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