Praxis 5001: Mathematics

Cardinal numbers : Numbers that indicate quantity, counting numbers (1, 2, 3)

Ordinal numbers : Numbers that describe position or order (first, second . . .)

Composite numbers : NOT prime. Whole numbers greater than 1 that have more than 2 different factors (4, 8, 12)

Greatest common factors : The largest factor that two or more numbers have in common.

Associative properties : The way numbers are grouped does not change the answer: addition- (a+b)+c=a+(b+c),Multiplication- (a+b)+c=ax(bxc)

Commutative properties : The way numbers are ordered in multiplication and division does change the answer (3x5 or 5x3 is the same)

Area of a circle : A=πr²

Circumference of a circle : 2πr

Hypotenuse : The side of a right triangle opposite the right angle (longest side)

Pythagorean theorem : a²+b²=c²

Sequence : A set of numbers, called terms, arranged in some particular order.

Arithmetic sequence : A sequence with the difference between two consecutive terms constant. The difference is called the common difference.

How many feet in a yard? : 3

How many yards in a mile? : 1760

What is the mean? : The average number

What is the median : The middle number

How many kilograms in a pound? : .45

Direct relationship : A relationship in which one variable increases with an increase in another variable. (y=kx)