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Alg 1, Chap 1
chapter 1 Vocab
45
Mathematics
8th Grade
08/12/2011

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Term
Variable
Definition
A letter or symbol used to represent a value that can change.
Term
Constant
Definition
A value that does not change. Ex: 5
Term
Constant
Definition
A value that does not change. Ex: 5
Term
Numerical Expression
Definition
Contains only constants and operations. Ex: 3+5
Term
Identify
Definition
Know, or be able to name.
Term
Subset
Definition
part of a set or group.
Term
Proprty
Definition
A feature or characteristic that describes an object or, a rule or law that the object satisfies.
Term
Demonstrate
Definition
To show.
Term
Assertion
Definition
A statement which is made without proof.
Term
Reciprocal
Definition
Numbers with a product of 1. Ex:2 X 1
- -
1 2
Term
Recognize
Definition
Know or understand.
Term
Sufficient
Definition
Enough.
Term
Refute
Definition
Show a statement is NOT true.
Term
Construct
Definition
To make or prepare
Term
Valid
Definition
True and correct.
Term
Formulate
Definition
Make or prepare like construct.
Term
Algebraic expression
Definition
Contains variables, constants and/or operations such as addition.
Term
Evaluate
Definition
Used with expressions to find their value.
Term
Replacement Set
Definition
A set of numbers that can be substituted for a variable in an expression
Term
Real Numbers
Definition
All the numbers represented by a number line. Can include fractions, whole numbers and decimals.
Term
Opposites
Definition
Two numbers which are the same but are on the other side of 0. Ex: 3 and -3.
Term
Additive Inverse
Definition
A number and its opposite are additive inverses. They are the same distance from 0 in the opposite direction. Ex: 4 and -4 are additive inveses.
Term
Multiplicative Inverses
Definition
A number and its reciprocal. 2 and 1/2 are multiplicative inverses.
Term
Power
Definition
An expression written with a base and an exponent.
Term
Base
Definition
A number with an exponent. Wrtten as the large number below the exponent.
Term
Exponent
Definition
The small number written to the upper right of the larger base number.
Term
Square Root
Definition
A number multiplied by itself to form a product is a square root of that product.
Term
Radical sign or symbol
Definition
Used to represent square roots.
Term
Perfect Square
Definition
A number whose positive square root is a whole number (not a decimal). Ex: the square root of 4 is 2.
Term
Cube Root
Definition
A number that is raised to the third power to form a product.
Term
Natural Numbers
Definition
The counting numbers 1, 2, 3...
Term
Whole Numbers
Definition
The natural numbers plus 0, 0, 1, 2, 3...
Term
Integers
Definition
The whole numbers and their opposites. -3, -2, -1, 0, 1, 2, 3...
Term
Rational numbers
Definition
All numbers which can be written a
-
b
where b is not =0 and if divided the resulting decimal is either a repeating or non-repeating decimal.
Term
Irrational numbers
Definition
Any non-perfect square is an irrational number because the decimal is neither repeating nor terminating.
Term
Conditional Statement
Definition
A statement in "if...then" form.
Term
Hypothesis
Definition
Part of a conditional statement that follows the "if" part.
Term
Conclusion
Definition
the part of a conditional statement that follows the "then" part.
Term
The converse of a conditional statement
Definition
Formed by exchanging the hypothesis and the conclusion.
Term
Counterexample
Definition
An example the disproves a statement or that shows the statement is false.
Term
Order of operations
Definition
GEMDAS, Grouping, Exponents, Multiplication, Division, Addition, Subtraction.
Term
Terms
Definition
Yhr parts that are added or subtracted.
Term
Like Terms
Definition
Contain te same variables, riased to the same powers, or are both constants.
Term
Coefficient
Definition
The number multiplied by the variable. It is directly in front of the variable.
Term
Perimeter
Definition
The area around a shape. The sides added together.
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