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: 35×20
    Solution:
    35×20 = 700
    Column vertical calculation:

							3	5
✖							2	0
							0	0
						7	0
						7	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 32×40
    Solution:
    32×40 = 1280
    Column vertical calculation:

							3	2
✖							4	0
							0	0
					1	2	8
					1	2	8	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 34×20
    Solution:
    34×20 = 680
    Column vertical calculation:

							3	4
✖							2	0
							0	0
						6	8
						6	8	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 32×20
    Solution:
    32×20 = 640
    Column vertical calculation:

							3	2
✖							2	0
							0	0
						6	4
						6	4	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 35×2
    Solution:
    35×2 = 70
    Column vertical calculation:

						3	5
✖							2
						7	0
						7	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 32×4
    Solution:
    32×4 = 128
    Column vertical calculation:

						3	2
✖							4
					1	2	8
					1	2	8

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 34×2
    Solution:
    34×2 = 68
    Column vertical calculation:

						3	4
✖							2
						6	8
						6	8

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>>注：本次最多计算 7 道题。

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