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: 23×40
    Solution:
    23×40 = 920
    Column vertical calculation:

							2	3
✖							4	0
							0	0
						9	2
						9	2	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 26×20
    Solution:
    26×20 = 520
    Column vertical calculation:

							2	6
✖							2	0
							0	0
						5	2
						5	2	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 23×300
    Solution:
    23×300 = 6900
    Column vertical calculation:

								2	3
✖							3	0	0
								0	0
							0	0
						6	9
						6	9	0	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 17×100
    Solution:
    17×100 = 1700
    Column vertical calculation:

								1	7
✖							1	0	0
								0	0
							0	0
						1	7
						1	7	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 23×400
    Solution:
    23×400 = 9200
    Column vertical calculation:

								2	3
✖							4	0	0
								0	0
							0	0
						9	2
						9	2	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 26×200
    Solution:
    26×200 = 5200
    Column vertical calculation:

								2	6
✖							2	0	0
								0	0
							0	0
						5	2
						5	2	0	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 26×4
    Solution:
    26×4 = 104
    Column vertical calculation:

						2	6
✖							4
					1	0	4
					1	0	4

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>>注：本次最多计算 7 道题。

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