29 terms

coloraturaPLUS

Hello! Are you planning to take either of the SAT Math subject tests? Well, if you are, you've come to the right place! In this Quizlet class we will be reviewing indispensable mathematical concepts that will help you succeed the day of the test!
This Quizlet set contains all of the arithmetic necessary for the test: factors, multiples, fractions, percents, and averages.

Factors

All of the numbers by which it can be divided evenly. Factors are also known as "divisors."

Factorization of a number

A complete list of a number's factors.

Factorization of 60:

2 x 2 x 3 x 5

Factorization of 75:

3 x 5 x 5

What is the smallest number divisible by both 14 and 12?

84

Multiples

All the numbers that are evenly divisible by your original number.

Factors are...

few

Multiples are...

many

What is the largest factor of 180 that is NOT a multiple of 15?

36

even + even

even

even - even

even

odd + odd

even

odd - odd

even

even + odd

odd

even - odd

odd

even x even

even

even x odd

even

odd x odd

odd

PEMDAS (order of operations)

P=parenthesis

E=exponents

M=multiplication

D=division

A=addition

S=subtraction

E=exponents

M=multiplication

D=division

A=addition

S=subtraction

To turn fractions to decimals, you..

do the division represented by the fraction bar.

To turn a decimal into a fraction, you..

count the number of decimal places(digits to the right of the decimal point), then place the number over a 1 with the same number of zeros, and reduce.

To turn a decimal into a percent sign, you..

just move the decimal point two places to the right, and add the percent sign.

To turn percentages into decimal numbers, you..

get rid of the percent sign and move the decimal point two places to the left.

% Change =

(Amount Change/Original) x 100

Whenever you increase a quantity by a percent and then decrease by the same percent, your final result will always be..

a little bit smaller than your original amount.

Original x (1 + Rate)^(# of changes/years) =

Final amount for a percent-increase number

Original x (1 - Rate)^(# of changes/years) =

Final amount for a percent-decrease number

Average/Mean

Total/Number of things

Average/mean pie chart

Total/(number of things)(average)