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: 5×222
    Solution:
    5×222 = 1110
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 7×178
    Solution:
    7×178 = 1246
    Column vertical calculation:

								7
✖						1	7	8
							5	6
						4	9
						7
					1	2	4	6

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 5×184
    Solution:
    5×184 = 920
    Column vertical calculation:

								5
✖						1	8	4
							2	0
						4	0
						5
						9	2	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 724×5
    Solution:
    724×5 = 3620
    Column vertical calculation:

						7	2	4
✖								5
					3	6	2	0
					3	6	2	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 6×299
    Solution:
    6×299 = 1794
    Column vertical calculation:

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

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 3×214
    Solution:
    3×214 = 642
    Column vertical calculation:

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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 830×7
    Solution:
    830×7 = 5810
    Column vertical calculation:

						8	3	0
✖								7
					5	8	1	0
					5	8	1	0

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>>注：本次最多计算 7 道题。

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