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: 889*7
    Solution:
    889*7 = 6223
    Column vertical calculation:

						8	8	9
✖								7
					6	2	2	3
					6	2	2	3

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 887*6
    Solution:
    887*6 = 5322
    Column vertical calculation:

						8	8	7
✖								6
					5	3	2	2
					5	3	2	2

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 466*6
    Solution:
    466*6 = 2796
    Column vertical calculation:

						4	6	6
✖								6
					2	7	9	6
					2	7	9	6

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 456*7
    Solution:
    456*7 = 3192
    Column vertical calculation:

						4	5	6
✖								7
					3	1	9	2
					3	1	9	2

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 999*7
    Solution:
    999*7 = 6993
    Column vertical calculation:

						9	9	9
✖								7
					6	9	9	3
					6	9	9	3

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 153*3
    Solution:
    153*3 = 459
    Column vertical calculation:

						1	5	3
✖								3
						4	5	9
						4	5	9

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 150*3
    Solution:
    150*3 = 450
    Column vertical calculation:

						1	5	0
✖								3
						4	5	0
						4	5	0

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>>注：本次最多计算 7 道题。

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