Online Math Dictionary: A

Easy to understand math definitions for K-Algebra mathematics
Just scroll down or click on the word you want and I'll scroll down for you!

abacus absolute value acceleration
acre acute angle addend
additive identity additive inverse adjacent
algebra algorithm alternate exterior angles
alternate interior angles alternating sequence amplitude
angle annual annuity
arc area arithmetic
associative property
of addition
associative property
of multiplication
axiom axis of symmetry  


An abacus is an ancient  calculating device used for addition, subtraction, multiplication, division, square roots and cube roots.   It's 
still used today in some countries.

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Absolute Value
An absolute value is a number's distance from zero on the number line.
Examples:   | 0 | =         | 5 | = 5       | -3 | = 3
For more information on absolute values, check out my Absolute Value Review lesson.
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Acceleration is the change in something's speed (velocity).  When you are speeding up, you are accelerating.  When you are slowing down, you are "accelerating" - well, that's what they'd say in a Physics class, but we say "decelerating."
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An acre is a unit of measure used for measuring land in the United States.  An acre is 43,560 square feet or 4,840 square yards.