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: 62×200
    Solution:
    62×200 = 12400
    Column vertical calculation:

								6	2
✖							2	0	0
								0	0
							0	0
					1	2	4
					1	2	4	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 14×300
    Solution:
    14×300 = 4200
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 14×400
    Solution:
    14×400 = 5600
    Column vertical calculation:

								1	4
✖							4	0	0
								0	0
							0	0
						5	6
						5	6	0	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 23×2
    Solution:
    23×2 = 46
    Column vertical calculation:

						2	3
✖							2
						4	6
						4	6

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 43×2
    Solution:
    43×2 = 86
    Column vertical calculation:

						4	3
✖							2
						8	6
						8	6

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 42×4
    Solution:
    42×4 = 168
    Column vertical calculation:

						4	2
✖							4
					1	6	8
					1	6	8

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 16×4
    Solution:
    16×4 = 64
    Column vertical calculation:

						1	6
✖							4
						6	4
						6	4

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>>注：本次最多计算 7 道题。

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