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: 560*2
    Solution:
    560*2 = 1120
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 505*2
    Solution:
    505*2 = 1010
    Column vertical calculation:

						5	0	5
✖								2
					1	0	1	0
					1	0	1	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 607*3
    Solution:
    607*3 = 1821
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 762*3
    Solution:
    762*3 = 2286
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 707*2
    Solution:
    707*2 = 1414
    Column vertical calculation:

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

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 470*2
    Solution:
    470*2 = 940
    Column vertical calculation:

						4	7	0
✖								2
						9	4	0
						9	4	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 205*3
    Solution:
    205*3 = 615
    Column vertical calculation:

						2	0	5
✖								3
						6	1	5
						6	1	5

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>>注：本次最多计算 7 道题。

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