计算:1000+999-998+997+996-995+…+103+102-101=______.
人气:202 ℃ 时间:2019-11-02 11:14:01
解答
1000+999-998+997+996-995+…+103+102-101,
=1001+998+995+…+104,
=(1001+104)×300÷2,
=1105×300÷2,
=165750.
故答案为:165750.
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