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: 33×2
    Solution:
    33×2 = 66
    Column vertical calculation:

						3	3
✖							2
						6	6
						6	6

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 24×30
    Solution:
    24×30 = 720
    Column vertical calculation:

							2	4
✖							3	0
							0	0
						7	2
						7	2	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 11×30
    Solution:
    11×30 = 330
    Column vertical calculation:

							1	1
✖							3	0
							0	0
						3	3
						3	3	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 16×20
    Solution:
    16×20 = 320
    Column vertical calculation:

							1	6
✖							2	0
							0	0
						3	2
						3	2	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 33×20
    Solution:
    33×20 = 660
    Column vertical calculation:

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

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 24×300
    Solution:
    24×300 = 7200
    Column vertical calculation:

								2	4
✖							3	0	0
								0	0
							0	0
						7	2
						7	2	0	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 11×300
    Solution:
    11×300 = 3300
    Column vertical calculation:

								1	1
✖							3	0	0
								0	0
							0	0
						3	3
						3	3	0	0

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>>注：本次最多计算 7 道题。

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