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| Numbers and Sets |
 About Algebra
Addition and Subtraction Multiplication and Division Criterions for Divisibility
 Types of NumbersGeometric Interpretation of Real Numbers Irrational Number  Properties of Real Numbers FractionsProportions Property of Equal Proportions Absolute ValuesGraphical Illustrations
SetsSubsets Operations with Sets Intervals |
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The addition of two numbers, a and b, is denoted by
a + b = c,
where c is the result of addition of a and b (or the sum of a and b); the quantities a and b are called addends. The subtraction of b from a is denoted by a – b = c,
where c is the result of subtraction (or the difference between a and b); a is called the subtrahend. The operation of subtraction can be expressed in terms of addition:
a – b = a + (–b ).
That is, to subtract b means to add the negative of b. The operations of addition and subtraction are related. So the definition of subtraction can be reformulated like below.
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