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: 22×50
    Solution:
    22×50 = 1100
    Column vertical calculation:

							2	2
✖							5	0
							0	0
					1	1	0
					1	1	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 50×90
    Solution:
    50×90 = 4500
    Column vertical calculation:

							5	0
✖							9	0
							0	0
					4	5	0
					4	5	0	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 90×500
    Solution:
    90×500 = 45000
    Column vertical calculation:

								9	0
✖							5	0	0
								0	0
							0	0
					4	5	0
					4	5	0	0	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 23×200
    Solution:
    23×200 = 4600
    Column vertical calculation:

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

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 22×500
    Solution:
    22×500 = 11000
    Column vertical calculation:

								2	2
✖							5	0	0
								0	0
							0	0
					1	1	0
					1	1	0	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 50×900
    Solution:
    50×900 = 45000
    Column vertical calculation:

								5	0
✖							9	0	0
								0	0
							0	0
					4	5	0
					4	5	0	0	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 34×3
    Solution:
    34×3 = 102
    Column vertical calculation:

						3	4
✖							3
					1	0	2
					1	0	2

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>>注：本次最多计算 7 道题。

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