巧算:9999*102—10000*101 7000—1—2—3—.—100
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/15 02:02:31
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巧算:9999*102—10000*101 7000—1—2—3—.—100
巧算:9999*102—10000*101 7000—1—2—3—.—100
巧算:9999*102—10000*101 7000—1—2—3—.—100
9999*102—10000*101
= (10000 - 1)*102 - 10000*101
= 10000*102 -102 - 10000*101
= 10000*102 - 10000*101 - 102
= 10000*(101 + 1) - 10000*101 - 102
= 10000*101 + 10000 - 10000*101 - 102
= 9898