Real Numbers
{1, 2, 3, 4, ....}
What are the natural or counting numbers?
The magnitude or distance between the origin and the point representing the real number on the real number line.
What is the absolute value of a real number?
All x
<= 2
What is the set of real numbers less than or equal to 2?
Letters used to represent numbers.
What are variables?
There are four arithmetic operations with real numbers.
What are addition, subtraction, multiplication, and division.
{0, 1, 2, 3, 4, .....}
What are the whole numbers?
|2 - 5|
What is 3?
In the bounded intervals [a,b] and (a,b), a and b are known as ...
What are endpoints?
A real number in an algebraic expression.
What is a constant?
The relationship between b and -b.
What is the additive inverse?
{...., -2, -1, 0, 1, 2, .....}
What are the integers?
|-a| = |a| =
What is a?
Inequalities can be used to describe subsets of real numbers called...
What are intervals?
The numerical factor of a variable term, e.g. 5a.
What is a coefficient?
The name for a and b in the fraction
a/b
What are numerator and denominator?
A number that can be written as a ratio p/q of two integers, q not equal to zero.
What are the rational numbers?
Let a and b be real numbers. d(a,b) = |b - a| = |a - b|
What is the distance between a and b?
[a,b] is a type of interval..
What is a closed interval?
Substituting a numerical value for each variable in an algebraic expression to find its value.
What is to evaluate?
2,3,5,7...
What are the prime numbers?
A number that cannot be written as a ratio of two integers(a nonrepeating decimal).
What is an irrational number?
If x < - 2,
|x + 2|/(x + 2) =
What is -1?
(a,b), [a,b), (a,b] are all the same type of interval.
What is a open interval?
a + b = b + a
What is the commutative property of addition?
The values of
0/a and a/0
What are zero and undefined?