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: 161×4
    Solution:
    161×4 = 644
    Column vertical calculation:

						1	6	1
✖								4
						6	4	4
						6	4	4

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 103×5
    Solution:
    103×5 = 515
    Column vertical calculation:

						1	0	3
✖								5
						5	1	5
						5	1	5

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 705×2
    Solution:
    705×2 = 1410
    Column vertical calculation:

						7	0	5
✖								2
					1	4	1	0
					1	4	1	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 404×3
    Solution:
    404×3 = 1212
    Column vertical calculation:

						4	0	4
✖								3
					1	2	1	2
					1	2	1	2

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 402×2
    Solution:
    402×2 = 804
    Column vertical calculation:

						4	0	2
✖								2
						8	0	4
						8	0	4

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 265×6
    Solution:
    265×6 = 1590
    Column vertical calculation:

						2	6	5
✖								6
					1	5	9	0
					1	5	9	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 256×3
    Solution:
    256×3 = 768
    Column vertical calculation:

						2	5	6
✖								3
						7	6	8
						7	6	8

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>>注：本次最多计算 7 道题。

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