###
Addends

2 or more numbers that are added

###
Sum

The result of addition

###
Difference

The result of subtraction

###
Subtrahend

A number that is being subtracted

###
Minuend

A number from which another number is being subtracted

###
Inverse operation

Operations that undo one another

###
Fact family

A group of 3 numbers related by addition and subtraction or multiplication or division

###
Factors

2 or more numbers that are multiplied

###
Product

The result of multiplication

###
Quotient

The result of division

###
Divisor

The number by which another number is divided

###
Dividend

A number that is divided

###
Remainder

An amount left after division

###
Fraction

Numbers that name parts of a whole

###
Denominator

The bottom number in a fraction

###
Numerator

The top number in a fraction

###
Line

Straight collection of points extending in opposite directions without end

###
Ray

A part of a line that begins at a point and continues without end in one direction

###
Segment

A part of a line with 2 distinct endpoints

###
Perimeter

The distance around a shape

###
Counting numbers

1,2,3,4,5,6...

###
Whole numbers

0,1,2,3,4,5...

###
Negative numbers

numbers less than 0

###
Sequence

A list of numbers arranged according to a certain rule

###
Terms

Numbers in a sequence

###
Even numbers

Numbers that can be divided by 2 without a remainder

###
Odd numbers

Numbers that can't be divided by 2 without a remainder

###
Place value

The value of a digit based on its position within a number

###
Positive Numbers

Numbers greater than 0

###
Opposites

2 numbers whose sum is 0

###
Integers

...-3,-2,-1,0,1,2,3...

###
Estimate

To determine an approximate value

###
Mixed number

A whole numbers and a fraction together

###
Average

The number found when the sum of 2 or more numbers are divided by the number of addends

###
Prime numbers

Numbers whose only 2 factors are itself and 1

###
Factors

A whole number that divides another whole number without a remainder

###
GCF

The largest number that is a factor of 2 or more given numbers

###
Improper fraction

A fraction with a numerator that is equal to or greater than the denominator

###
Ratio

A comparison of 2 numbers by division

###
Multiples

Products of a selected counting number and other counting numbers

###
Reduce

Rewrite a fraction in lowest terms

###
Circumference

The distance around a circle

###
Diameter

The distance across a circle through its center

###
Radius

The distance from the center of the circle to a point on the outside

###
Compass

A tool used to draw circles

###
Concentric circles

2 or more circles with a common center

###
Circle

A closed, curved shape in which all points on the shape are the same distance from its center

###
Plane

A flat surface that has no boundaries

###
Parallel lines

Lines in the same plane that don't intersect

###
Intersect

2 lines that share a point

###
Perpendicular lines

2 lines that intersect at right angles

###
Oblique lines

Lines that are in the same plane that are neither parallel nor perpendicular

###
Angles

The opening that is formed When2 lines, rays, or segments meet

###
Vertex

A point of an angle or polygon where 2 or more lines rays or segments meet

###
Right angle

An angle whose opening forms a square corner

###
Acute angle

An angle whose opening is smaller than a right angles

###
Obtuse angle

An angle whose opening is larger than a right angle and smaller than a straight line

###
LCM

The smallest whole number that is a multiple of 2 or more given

numbers

###
Reciprocal

2 numbers whose product is 1

###
Term

A number that serves as a numerator or denominator

###
Degrees

Units for measuring angles

###
Protractor

A tool used to measure and draw angles

###
Area

The number of square units needed to cover a surface

###
Expanded Notation

A way of writing of writing a number as the sum of the products of the digits and the place values of the digits and the place value of the digits

###
A.M.

The period of time from midnight to just before noon

###
P.M.

The period of time from noon to just before midnight

###
PI

The number of diameters equal to the circumference of a circle

###
Percent

A fraction with a denominator of 100 expressed as a percent sign

###
Decimal point

The symbol in a decimal number used as a reference for place value

###
Decimal place

Places to the right of the decimal pint

###
Exponent

The upper number in an exponential expression

###
Base

The lower number in an exponential expression

###
Square root

One of 2 factors of a number

###
Perfect square

The product when a whole number is multiplied by itself

###
Circle graphs

A method of displaying data often using percentages

###
Quantitative

Expressed in or relating to quantities or numbers

###
Qualitative

Expressed in or relating to categories rather than quantities or numbers

###
Sales tax

The fee charged on the sale of an item and based upon the item's purchase

###
Equivalent fractions

Different fractions that name the same amount

###
Sector

A region bordered by part of a circle and 2 radii

###
Mean

The average of a list of numbers

###
Median

The middle number of an ordered list of numbers

###
Mode

The number or numbers that appears most often in a list of data

###
Bimodal

Having 2 or more modes

###
Range

The difference between the largest and smallest numbers on the list

###
Common denominators

A number that is a denominator of 2 or more fractions

###
Probability

The ratio of favorable outcomes to all possible outcomes

###
Chance

A way of expressing the like hood of an event as a percentage

###
Triangle

3 sided polygon

###
Quadrilateral

4 sided polygon

###
Pentagon

5 sided polygon

###
Hexagon

6 sided polygon

###
Octagon

8 sided polygon

###
Polygon

A closed, flat shape with straight sides

###
Regular polygon

A polygon in which all sides have equal length and all angels have equal measure

###
Congruent

Having the same size and shape

###
Side

A line segment hat is part of a polygon

###
Commutative prop. of addition

Changing the order of the addends does not change the sum

###
Identity prop. of addition

The sum of any number and 0 is the initial number

###
Commutative prop. of multiplication

Changing the order of the factors does not change the sum

###
Identity prop. of multiplication

The product of any number and 1 is equal to the initial number

###
Zero prop. of multiplication

Any number times 0 is 0

###
Associative prop. of addition

The grouping of the addends does not change the sum

###
Associative prop. of multiplication

The grouping of the factors does not change the product

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