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How to Do Math Sums
"The term ""sum"" is used in mathematics to describe the result of adding two or more numbers together. Finding the sum of two or more numbers is one of the most fundamental operations in arithmetic and is a necessary skill to master before you can move on"... More »
Difficulty: Easy
Source: www.ehow.com

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 sequentially from left to right, any intermediate result is a partial sum, prefix sum, or running total of the summation. The numbers to be summed (called addends, ...

www.mathsisfun.com/definitions/sum.html

Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.

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: The sum of 6 and 8 is 14. See more.

www.dr-aart.nl/Arithmetic-sum-difference-product-quotient.html

Sum. The sum of two or more numbers is the outcome of adding these numbers. Example: Calculate the sum of 13, 5 and 8. Answer: 13 + 5 + 8 = 26. The parts you add are called terms. Example: Which terms are in the formula y = 3 x 2 + 6 x + 8? Answer: Three terms, namely 3 x 2, 6 x and 8.

www.mathsteacher.com.au/year8/ch01_arithmetic/01_basic/oper.htm

Recall: The four basic mathematical operations are: Addition, subtraction, multiplication and division. Addition. Adding two (or more) numbers means to find their sum (or total). The symbol used for addition is '+'. For example, 5 + 10 = 15. This is read as five plus ten is equal to fifteen or simply, five plus ten is fifteen. Example ...

What I want to do in this video is introduce you to the idea of Sigma notation, which will be used extensively through your mathematical career. So let's just say you wanted to find a sum of some terms, and these terms have a pattern. So let's say you want to find the sum of the first 10 numbers. So you could say 1 plus 2 plus ...

mathworld.wolfram.com/Sum.html

The numbers being summed are called addends, or sometimes summands. The summation operation can also be indicated using a capital sigma with upper and lower limits written above and below, and the index indicated below. For example , the above sum could be written ...