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1 kilometer = _____ meters
1000

1 meter = ____ centimeters
100

1 centimeter = ____ millimeters
10






1 gallon = ____ fluid ounces
128



1 cup = ____ fluid ounces
8




Perimeter of a rectangle
2l+2w or 2(l+w)

Circumference of a Circle
C=2πr or C=πd


Area of a Rectagle
A=lw or A=bh

Area of a Triangle
A=1/2bh or A=bh/2

Area of a Trapezoid
A= 1/2 (b_{1} +b_{2})h or A=((b_{1}+b_{2})h)/2

Area of Circle
A = πr^{2}


Volume of a Rectangular Prism
V=lwh


Operation: + addition
Solution: Sum

Operation:  subtraction
Solution: difference

Operation: x multiplication
Solution: product

Operation: divide
Solution: quotient

Order of Operations
PEMDAS

A number is divisible by 2 if . . .
It is an even number

A number is divisible by 3 if . . .
The sum of its digits is divisible by 3

A number is divisible by 4 if . . .
The last 2 digits are divisible by 4

A number is divisible by 5 if . . .
The last digit is 5 or 0

A number is divisible by 6 if . . .
It is divisible by both 2 and 3

A number is divisible by 8 if . . .
The last 3 digits are divisible by 8

A number is divisible by 9 if . . .
The sum of its digits is divisible by 9

A number is divisible by 10 if . . .
The last digit is 0

Prime number
A number with only 2 factors—1 and itself

Composite number
A number with more than 2 factors

Greatest Common Factor (GCF)
The largest factor that divides into 2 numbers

Least Common Multiple (LCM)
The smallest number (not 0) that 2 numbers will divide into evenly

Percent Ratios
Problem  z is what % of y?
Solve using: =
So, =
What is 60% of 90?

Decimal to Fraction
the number after the decimal is the numerator; place value is the denominator
Change .15 to a fraction
.15 =

Fraction to Percent
change fraction to decimal; use rules to change decimal to percent
= ____%
= 5/3.0 = .6 = 60%

Fraction to Decimal
(divide)
= 0.___
4/1.00=.25

Decimal to Percent
multiply by 100; decimal moves 2 places to the right; label percent
.007 = ____%
.007 = .7%

Percent to Decimal
divide by 100; decimal moves 2 places to the left; drop percent sign
8.5% = ___
8.5% = .085

Percent to Fraction
then reduce
35% = ______

freezing point of water
32^{o}F
__^{o}C
0

Temperature
Celcius to Fahrenheit

Temperature
Fahrenheit to Celcius

Commutative Property
(the numbers switch positions)
Addition

Commutative Property
(the numbers switch positions)
Multiplication

Associative Property
(the parentheses change positions)
Addition

Associative Property
(the parentheses change postions)
Multiplication

Inverse Property
(addition uses the opposite, multiplication uses the reciprocal)
Addition

Inverse Property
(addition uses the opposite, multiplication uses the reciprocal)
Multiplication
when a does not equal 0

Distributive Property
(always involves 2 operations)

Cross Product Property  Cross Multiplication
(use to prove 2 ratios are in proportion)
is equivalent to

