Average
Add $n$ numbers and divide the result by $n$.
Associative Property of Multiplication
When three real numbers are multiplied, it makes no difference which two are multiplied first.
Associative Property of Addition
When three real numbers are added, it makes no difference which two are added first.
Area formula
A formula used to find the area of geometric objects or figures. Area is measured in square units.
Approximately equal to
The symbol $\,\approx\,$ represents an answer that is rounded to a specified number of decimal places.
Alternative rule for subtracting two fractions
If $a$, $b$, $c$, and $d$ are integers with $b\ne 0$ and $d\ne 0$, then $\,\displaystyle{a\over b}-{c\over d}={{ad-bc}\over{bd}}$.
Alternative rule for adding two fractions
If $a$, $b$, $c$, and $d$ are integers with $b\ne 0$ and $d\ne 0$, then $\,\displaystyle{a\over b}+{c\over d}={{ad+bc}\over{bd}}$.
Algebraic inequality
An inequality that contains one or more variable terms.
Algebraic expression
A collection of variables and constants combined by using addition, subtraction, multiplication, or division.
Algebraic equation
Uses an equal sign to set two algebraic expressions equal to each other and is true for only certain values of the variable.
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