en.wikipedia.org/wiki/Summation

In **mathematics**, summation (capital Greek sigma symbol: ∑) is the addition of a
sequence of numbers; the result is their **sum** or total. If numbers are added ...

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**Math** explained in easy language, plus puzzles, games, quizzes, worksheets and
... **Sum**. The result of adding two or more numbers. Example: 9 is the **sum** of 2, ...

www.dictionary.com/browse/sum

**Sum** definition, the aggregate of two or more numbers, magnitudes, quantities, or
particulars as determined by or as if by the **mathematical** process of addition: ...

www.khanacademy.org/math/algebra2/sequences-and-series/alg2-sigma-notation/v/sigma-notation-sum

No, the **sum** notation does not accept negative number, fraction or decimal. ....
https://www.google.com/url?q=https://www.khanacademy.org/**math**/integral- ...

mathworld.wolfram.com/Sum.html

For example, adding 1, 2, 3, and 4 gives the **sum** 10, written ... J. Prime
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www.splashmath.com/math-vocabulary/addition/sum

Definition of **Sum** explained with illustrated examples. Also, practice lots of **math**
problems with fun **math** worksheets at Splash **Math**.

www.mathwords.com/s/sum.htm

**Sum**. The result of adding a set of numbers or algebraic expressions. this page
updated 19-jul-17. Mathwords: Terms and Formulas from Algebra I to Calculus

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