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: 931×9
    Solution:
    931×9 = 8379
    Column vertical calculation:

						9	3	1
✖								9
					8	3	7	9
					8	3	7	9

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 164×8
    Solution:
    164×8 = 1312
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 675×3
    Solution:
    675×3 = 2025
    Column vertical calculation:

						6	7	5
✖								3
					2	0	2	5
					2	0	2	5

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 825×8
    Solution:
    825×8 = 6600
    Column vertical calculation:

						8	2	5
✖								8
					6	6	0	0
					6	6	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 968×8
    Solution:
    968×8 = 7744
    Column vertical calculation:

						9	6	8
✖								8
					7	7	4	4
					7	7	4	4

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 324×4
    Solution:
    324×4 = 1296
    Column vertical calculation:

						3	2	4
✖								4
					1	2	9	6
					1	2	9	6

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 524×8
    Solution:
    524×8 = 4192
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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