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: 22×2
    Solution:
    22×2 = 44
    Column vertical calculation:

						2	2
✖							2
						4	4
						4	4

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 13×50
    Solution:
    13×50 = 650
    Column vertical calculation:

							1	3
✖							5	0
							0	0
						6	5
						6	5	0

[3/7 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

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 16×10
    Solution:
    16×10 = 160
    Column vertical calculation:

							1	6
✖							1	0
							0	0
						1	6
						1	6	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 22×20
    Solution:
    22×20 = 440
    Column vertical calculation:

							2	2
✖							2	0
							0	0
						4	4
						4	4	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 13×500
    Solution:
    13×500 = 6500
    Column vertical calculation:

								1	3
✖							5	0	0
								0	0
							0	0
						6	5
						6	5	0	0

[7/7 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

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>>注：本次最多计算 7 道题。

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