CSET Math Subtest I - Number & Quantity

natural numbers

counting numbers

whole numbers

counting numbers and zero

integers

counting numbers, zero, and negative numbers

rational numbers

counting numbers, zero, negative numbers, fractions, and decimals

irrational numbers

infinite decimals

real numbers

both rational and irrational numbers

imaginary numbers

the square root of -1

complex number

a combination of real and imaginary numbers

relatively prime

when two numbers do not SHARE a GCF other than 1

composite

positive integer that can be divide by a number greater than 1

prime

can be divided only by itself and one

commutative property

order does not matter for multiplication and addition

associative property

you can add and multiply regardless of how the numbers are grouped

distributive property

multiplication distributes over addition and subtraction

multiplicative identity

A(1)=A

additive identity

A+0=A

multiplicative inverse

A(1/A)=1

additive inverse

A is -A

additive property of zero

B+0=B

multiplicative property of zero

A(0)=0

multiplicative property of one

A(1)=A

find percent increase/decrease based on numeric change

Δ/Original Amount

find numerical increase/decrease based on % change

(x)(%)