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Find the sum of the whole numbers from 1 to 870.
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Find the sum of the whole numbers from 1 to 870.

User Beano
by
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1 Answer

1 vote

Answer: 378,885

Explanation:

We could just add it all up but there is a simple easy formula :D

n(n + 1)/2 = Sum of Integers

We make n be the biggest number in the sequence. n=870 then

870(870 + 1)/2 = 378,885

Just by using a simple formula, we were able to calculate the sum very quickly.

I hope this helps!

User Bernard Sfez
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3.1k points
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