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: 267×3
    Solution:
    267×3 = 801
    Column vertical calculation:

						2	6	7
✖								3
						8	0	1
						8	0	1

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 435×7
    Solution:
    435×7 = 3045
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 357×3
    Solution:
    357×3 = 1071
    Column vertical calculation:

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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 198×8
    Solution:
    198×8 = 1584
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 277×2
    Solution:
    277×2 = 554
    Column vertical calculation:

						2	7	7
✖								2
						5	5	4
						5	5	4

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 577×2
    Solution:
    577×2 = 1154
    Column vertical calculation:

						5	7	7
✖								2
					1	1	5	4
					1	1	5	4

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 255×2
    Solution:
    255×2 = 510
    Column vertical calculation:

						2	5	5
✖								2
						5	1	0
						5	1	0

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>>注：本次最多计算 7 道题。

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