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: 6×50
    Solution:
    6×50 = 300
    Column vertical calculation:

							6
✖						5	0
							0
					3	0
					3	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 22×5
    Solution:
    22×5 = 110
    Column vertical calculation:

						2	2
✖							5
					1	1	0
					1	1	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 70×8
    Solution:
    70×8 = 560
    Column vertical calculation:

						7	0
✖							8
					5	6	0
					5	6	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 30×9
    Solution:
    30×9 = 270
    Column vertical calculation:

						3	0
✖							9
					2	7	0
					2	7	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 70×9
    Solution:
    70×9 = 630
    Column vertical calculation:

						7	0
✖							9
					6	3	0
					6	3	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 40×6
    Solution:
    40×6 = 240
    Column vertical calculation:

						4	0
✖							6
					2	4	0
					2	4	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 27×8
    Solution:
    27×8 = 216
    Column vertical calculation:

						2	7
✖							8
					2	1	6
					2	1	6

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>>注：本次最多计算 7 道题。

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