Question #128819

1+2+3+...+999+1000=?


1
Expert's answer
2020-08-07T15:44:29-0400

1+2+3+...+999+1000=(1+1000)+(2+999)+(3+998)+...+(500+501)=500∗1001=5005001+2+3+...+999+1000=(1+1000)+(2+999)+(3+998)+...+(500+501)=500*1001=500500


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Jyoti
07.08.20, 13:54

500500

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