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Best Answer

640000.

First odd number is 1, 800th odd number is 1599, giving their sum:

sum = number_of_numbers x (first_number + last_number) ÷ 2

= 800 x (1 + 1599) ÷ 2

= 640000

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13y ago

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Q: What is the sum of the first 800 consecutive odd numbers?
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