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: 120×7
    Solution:
    120×7 = 840
    Column vertical calculation:

						1	2	0
✖								7
						8	4	0
						8	4	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 170×8
    Solution:
    170×8 = 1360
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 230×6
    Solution:
    230×6 = 1380
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 760×3
    Solution:
    760×3 = 2280
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 806×2
    Solution:
    806×2 = 1612
    Column vertical calculation:

						8	0	6
✖								2
					1	6	1	2
					1	6	1	2

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 330×5
    Solution:
    330×5 = 1650
    Column vertical calculation:

						3	3	0
✖								5
					1	6	5	0
					1	6	5	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 740×5
    Solution:
    740×5 = 3700
    Column vertical calculation:

						7	4	0
✖								5
					3	7	0	0
					3	7	0	0

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>>注：本次最多计算 7 道题。

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