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: 313×5
    Solution:
    313×5 = 1565
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 225×4
    Solution:
    225×4 = 900
    Column vertical calculation:

						2	2	5
✖								4
						9	0	0
						9	0	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 275×5
    Solution:
    275×5 = 1375
    Column vertical calculation:

						2	7	5
✖								5
					1	3	7	5
					1	3	7	5

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 746×4
    Solution:
    746×4 = 2984
    Column vertical calculation:

						7	4	6
✖								4
					2	9	8	4
					2	9	8	4

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 564×9
    Solution:
    564×9 = 5076
    Column vertical calculation:

						5	6	4
✖								9
					5	0	7	6
					5	0	7	6

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 4×454
    Solution:
    4×454 = 1816
    Column vertical calculation:

								4
✖						4	5	4
							1	6
						2	0
					1	6
					1	8	1	6

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 876×7
    Solution:
    876×7 = 6132
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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