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: 7000×909000
    Solution:
    7000×909000 = 6363000000
    Column vertical calculation:

											7	0	0	0
✖									9	0	9	0	0	0
											0	0	0	0
										0	0	0	0
									0	0	0	0
							6	3	0	0	0
							0	0	0	0
					6	3	0	0	0
					6	3	6	3	0	0	0	0	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 19000×90000
    Solution:
    19000×90000 = 1710000000
    Column vertical calculation:

										1	9	0	0	0
✖										9	0	0	0	0
										0	0	0	0	0
									0	0	0	0	0
								0	0	0	0	0
							0	0	0	0	0
					1	7	1	0	0	0
					1	7	1	0	0	0	0	0	0	0

[3/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 128000÷1000
    Solution:
    128000÷1000 = 128
    Column vertical calculation:

								1	2	8
1	0	0	0	丿	1	2	8	0	0	0
					1	0	0	0
						2	8	0	0
						2	0	0	0
							8	0	0	0
							8	0	0	0
										0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 38000×90000
    Solution:
    38000×90000 = 3420000000
    Column vertical calculation:

										3	8	0	0	0
✖										9	0	0	0	0
										0	0	0	0	0
									0	0	0	0	0
								0	0	0	0	0
							0	0	0	0	0
					3	4	2	0	0	0
					3	4	2	0	0	0	0	0	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 12800×40000
    Solution:
    12800×40000 = 512000000
    Column vertical calculation:

										1	2	8	0	0
✖										4	0	0	0	0
										0	0	0	0	0
									0	0	0	0	0
								0	0	0	0	0
							0	0	0	0	0
						5	1	2	0	0
						5	1	2	0	0	0	0	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer division
    Original question: 128000÷10000
    Solution:
    128000÷10000 = 12 ··· ··· 8000
    Column vertical calculation:

										1	2
1	0	0	0	0	丿	1	2	8	0	0	0
						1	0	0	0	0
							2	8	0	0	0
							2	0	0	0	0
								8	0	0	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 12800×6000
    Solution:
    12800×6000 = 76800000
    Column vertical calculation:

									1	2	8	0	0
✖										6	0	0	0
									0	0	0	0	0
								0	0	0	0	0
							0	0	0	0	0
						7	6	8	0	0
						7	6	8	0	0	0	0	0

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>>注：本次最多计算 7 道题。

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