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: 37×3
    Solution:
    37×3 = 111
    Column vertical calculation:

						3	7
✖							3
					1	1	1
					1	1	1

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 30×4
    Solution:
    30×4 = 120
    Column vertical calculation:

						3	0
✖							4
					1	2	0
					1	2	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 34×5
    Solution:
    34×5 = 170
    Column vertical calculation:

						3	4
✖							5
					1	7	0
					1	7	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 30×6
    Solution:
    30×6 = 180
    Column vertical calculation:

						3	0
✖							6
					1	8	0
					1	8	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 50×6
    Solution:
    50×6 = 300
    Column vertical calculation:

						5	0
✖							6
					3	0	0
					3	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 30×7
    Solution:
    30×7 = 210
    Column vertical calculation:

						3	0
✖							7
					2	1	0
					2	1	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 2×80
    Solution:
    2×80 = 160
    Column vertical calculation:

							2
✖						8	0
							0
					1	6
					1	6	0

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>>注：本次最多计算 7 道题。

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