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: 101×2
    Solution:
    101×2 = 202
    Column vertical calculation:

						1	0	1
✖								2
						2	0	2
						2	0	2

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 104×5
    Solution:
    104×5 = 520
    Column vertical calculation:

						1	0	4
✖								5
						5	2	0
						5	2	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 122×4
    Solution:
    122×4 = 488
    Column vertical calculation:

						1	2	2
✖								4
						4	8	8
						4	8	8

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 121×2
    Solution:
    121×2 = 242
    Column vertical calculation:

						1	2	1
✖								2
						2	4	2
						2	4	2

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 361×2
    Solution:
    361×2 = 722
    Column vertical calculation:

						3	6	1
✖								2
						7	2	2
						7	2	2

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 362×6
    Solution:
    362×6 = 2172
    Column vertical calculation:

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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 361×4
    Solution:
    361×4 = 1444
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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