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167 Cards in this Set
 Front
 Back
period

Each group of three digits separated by commas in a multidigit number


expression

A part of a number sentence that combines numbers and operation signs but does not have an equal sign


millions

The period after thousands


variable

A letter or symbol that stands for a number or numbers


benchmark

A known number of things that helps you understand the size or amount of a different number of things


Commutative Property of Addition

The property that states that when the order of two addends is changed, the sum is the same


round

To replace a number with another number that tells about how many or how much


Associative Property of Addition

The property that states that you can group addends in different ways and still get the same sum


Identity Property of Addition

The property that states that when you add zero to any number, the sum is that number


century

A measure of time equal to 100 years


equation

A number sentence which shows that two quantities are equal


decade

A measure of time equal to 10 years


second

A small unit of time; 60 seconds = 1 minute


survey

A method of gathering information to record data


elapsed time

The time that passes from the start of an activity to the end of that activity


frequency

The number of times an event ocurs


cumulative frequency

A running total of items being counted


line plot

A graph that shows the frequency of data along a number line


mean

The number found by dividing the sum of the set of numbers by the number of addends


range

The difference between the greatest number and the least number in a set of data


median

The middle number in an ordered set of data


outlier

A value separated from the rest of the data


mode

The number (s) or item(s)that occur most often in a set of data


stem  and  leaf plot

A data display that shows groups of data arranged by place value


stem

A tens digit in a stemand leaf plot


doublebar graph

A graph used to compare similar kinds of data


leaf

A ones digit in a stemleaf plot


trends

On a graph, areas where the data increase, decrease, or stay the same over time


scale

The numbers placed at fixed distances on a graph to help label the graph


line graph

A graph that uses a line to show how data change over a period of time


interval

The difference between two numbers on the sale of a graph


circle graph

A graph in the shape of a circle that shows data as a whole made up of different parts


inverse operations

Opposite operations that undo each other, such as addition and subtraction or multiplication and division


Zero Property of Multiplication

The property that states that the product of 0 and any number is 0


fact family

A set of related multiplication and division or addition and subtaction equations


Commutative Property of Multiplication

The property that states that when the order of two factors is changed, the product is the same


multiple

The product of a given whole number and another whole number


Associative Property of Multiplication

The property that states that you can group factors in different ways and still get the same product


Identity Property of Multiplication

The property that states that the product of any number and 1 is that number


order of operations

Rules for performing operations in expressions with more than one operation; do the operations inside parentheses, then multiply and divide from left to right, then add and subtract from left to right


compatible numbers

Numbers that are easy to compute mentally


divisible

Capable of being divided so that the quotient is a whole number and the remainder is zero


Distributive Property

The property that states that multiplying a sum by a number is the same as multiplying each addend b the number and then adding the products


prime number

A number that has only two factors: 1 and itself


multistep problem

A problem requiring more than one step to solve


composite number

A whole number that has more than two factors


remainder

The amount left over when a number cannot be divided evenly


square number

The product of a number and itself


square root

One of two equal factors of a number


ray

a part of a line that has one endpoint and continues without end in one direction


point

An exact location in space


plane

A flat surface that extends without end in all dirterctions


line

A straight path of points in a plane that continues without end in both directions with no endpoints


angle

A figure formed by two line segments or rays that share the same endpoint


line segment

A part of a line that includes two points called endpoints and all the points between them


vertex

The point at which two rays of an angle or two or more line segments meet in a plane figure


protractor

A tool for measuring the size of an angle


obtuse angle

An angle that has a measure greater than 90 and less than 180


degree ( )

A unit for measuring angles or temperatures


straight angle

An angle that has a measure of 180


right angle

An angle that forms a square corner and has a measure of 90


intersecting lines

Lines that cross each other at exactly one point


acute angle

An angle that has a measure greater than 0 and less than 90


parallel lines

Lines in the same plane that never intersect and are always the same distance apart


perpendicular lines

Two lines that intersect to form four right angles


quadrilateral

A polygon with four sides


polygon

A closed plane figure with straight sides, each of which is a line segment


pentagon

A polygon with five sides


regular polygon

A polygon whose sides are all the same length


hexagon

A polygon with six sides


triangle

A polygon with three sides


octagon

A polygon with eight sides


triangular pyramid

A pyramid that has a triangular base and three triangular faces


net

A twodimensional pattern that can be folded to make a threedimensional figue


edge

The line segment where two or more faces of a solid figure meet


volume

The measure of the amount of space a solid figure occupies


face

A polygon that is a flat surface of a solid figure


cubic unit

A unit of volume with dimensions of 1 unit * 1 unit * 1 unit


vertex

The point at which two rays of an angle or two or more line segments meet in a plane figure or at which three or more edges meet in a solid figure


equivalent decimals

Two or more decimals that name the same amount


area

The number of square units needed to cover a surface


perimeter

The distance around a figure


twodimensional

Measured in two directions, such as length and width


formula

A set of symbols that expresses a mathematical rule


threedimensional

Mesured in three directions, such as length, width, and height


circumference

The distance around a circle


triangular prism

A solid figure that has two triangular bases and three rectangular faces


milliliter (mL)

A metric unit for measuring capacity; 1,000 milliliters = 1 liter


kilogram (kg)

A metric unit for measuring mass; 1 kilogram = 1,000 grams


liter (L)

A metric unit for measuring capacity; 1 liter  1,000 milliliters


ounce (oz)

A customary unit for measuring weight; 16 of these are equivalent to 1 pound


pound (lb)

A customary unit for measuring weight that is equivalent to 16 ounces


ton (T)

A customary unit for measuring weight that is equivalent to 2,000 pounds


millimeter (mm)

A metric unit for measuring length or distance; 1,000 millimeters = 1 meter


centimeter (cm)

A metric unit for measuring length or distance; 100 centimeters = 1 meter


decimeter (dm)

A metric unit for measuring length or distance; 10 decimeters = 1 meters


meter (m)

A metric unit for measuring length or distance; 1 meter = 100 centimeters


kilometer (km)

A metric unit for measuring length or distance; 1 kilometer = 1,000 meters


mile (mi)

A customary unit for measuring length or distance that is equivalent to 5,280 feet


cup (c)

A customary unit for measuring capacity that is equivalent to 8 ounces


capacity

The amount a container can hold when filled


pint (pt)

A customary unit for measuring capacity that is equivalent to 2 cups


teaspoon (tsp)

A customary unit for measuring cpacity; 3 of these are equivalent to 1 tablespoon


quart (qt)

A customary unit of measuring capacity that is equivalent to 2 pints


tablespoon (tbsp)

A customary unit for measuring capacity that is equivalent to 3 teaspoons


gallon (gal)

A customary unit for measuring capacity that is equivalent to 4 quarts


unlikely

Having a less that even chance of ahppening


linear units

Units for measuring length, width, height, or distance


equally likely

Having the same chance of happening


inch (in.)

A customary unit for measuring length or distance; 12 of these are equivalent to 1 foot


mathematical probability

A comparison of the number of favorable outcomes to the number of possible outcomes of an event


foot (ft)

A customary unit for measuring length or distance that is equivalent to 12 inches


tree diagram

An organized list that shows all possible outcomes of an event


yard (yd)

A customary unit for measuring length or distance that is equivalent to 3 feet


simplest form

The state a fraction is in when 1 is the only number that can divide evenly into both the numerator and denominator


outcome

A possible result of an experiment


mixed number

An amount given as a whole number and a fraction


event

One outcome or a combination of outcomes in an experiment


like fractions

Fractions with the same denominator


predict

To make a reasonable guess about what will happen


unlike fractions

Fractions with different denominators


likely

Having a greater than even chance of happening


xaxis

The horizontal line on a coordinate grid, or plane


yaxis

Th vertical line on a coordinate grid , or plane


fraction

A number that names a part of a whole or part of a group


numerator

The number above the bar in a fraction that tells how many parts of the whole or group are being considered


xcoordinate

The first number in an ordered pair that tells how far to move horizontally


denominator

The number below the bar in a fraction that tells how many equal parts are in the whole or group


ycoordinate

The second number in an ordered pair that tells how far to move vertically


equivalent fractions

Two or more fractions that name the same amount


equilateral triangle

A triangle with three equal, or congruent, sides


acute triangle

A triangle with three acute angles


isosceles triangle

A triangle with two equal, or congruent, sides


obtuse triangle

A triangle with one obtuse angle


scalene triangle

A triangle with no equal, or cobgruent, sides


parallelogram

A quadrilateral whose opposite sides are parallel and equal, or congruent


right triangle

A triangle with one right angle


rhombus

A parallelogram with four equal, or congruent, sides


trapezoid

A quadrilateral with exactly one pair of parallel sides


chord

A line segment that has endpoints on a circle


Venn diagram

A diagram that shows relationships among sets of things


diameter

A line segment that passes through the center of a circle and has endpoints on the circle


circle

A closed figure made up of points that are all the same distance from the center


radius

A line segment that has one endpoint at the center of a circle and the other endpoint on the circle


center

The point inside a circle that is the same distance from each point on the circle


compass

A tool used to construct circles


line symmetry

What a figure has if it can be folded about a line so that its two parts match exactly


transformation

A movement of a figure to a new position by a translation, reflection, or rotation


rotational symmetry

What a figure has if it can be turned about a central point and still look the same in at least two positions


translation

A movement of a figure to a new position along a straight line


congruent

Having the same size and shape


reflection

A movement of a figure to a new position by flipping the figure over a line


similar

Having the same shape but possibly different in size


rotation

A movement of a figure to a new position by rotating the figure around a point


tessellation

A repeating pattern of closed figures that covers a surface with no gaps and no overlaps


positive numbers

All numbers to the right of zero on the number line


degree
Fahrenheit ( F) 
A standard unit for measuring temperature


opposites

Numbers that are the same distance from zero but in opposite directions from zero


degree Celsius ( C)

A metric unit for measuring temperature


inequality

A mathemmatical sentence that shows that two expressions do not represent the same quantity


negative numbers

All numbers to the left of zero on the number line


ordered pair

A pair of numbers used to locate a point on a coordinate grid; the first number tells how far to move horizontally, and the second number tells how far to move vertically


gram (g)

A metric unit for measuring mass; 1.000 grams = 1 kilogram


thousandth

One of one thousand equal parts


mass

The amount of matter in an object


decimal point

A symbol used to separate dollars from cents in money and to separate the ones and the tenths places in a decimal


decimal

A number with one or more digits to the right of the decimal point
