A point at either end of a line segment, or a point at one end of a ray.

Back

Commutative Property of Multiplication

Front

Changing the order of the factors does not change the product.

Back

compare

Front

To decide if one number is greater than, less than, or equal to.

Back

digit

Front

Any of the symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.

Back

estimate

Front

To find a number close to an exact amount; an estimate tells about how much or about how many.

Back

divide

Front

To separate into equal groups and find the number in each group or the number of groups.

Back

acute angle

Front

An angle with a measure less than 90°.

Back

add

Front

To combine, put together two or more quantities.

Back

arc

Front

Part of a circle between any two of its points.

Back

classify

Front

To sort into categories or to arrange into groups by attributes.

Back

fact family

Front

A group of related facts that use the same numbers.
Also called related facts.

Back

capacity

Front

Capacity refers to the amount of liquid a container can hold.

Back

decompose

Front

To separate into components or basic elements.

Back

attribute

Front

A characteristic of an object, such as color, shape, size, etc.

Back

customary system

Front

A system of measurement used in the U.S. The system includes
units for measuring length, capacity, and weight.

Back

dividend

Front

A number that is divided by another number.

Back

degree (angle measure)

Front

A unit for measuring angles. Based on dividing one complete circle into 360 equal parts.

Back

additive comparison

Front

Problems that ask how much more (or less) one amount is than another.

Back

algorithm

Front

A step-by-step method for computing.

Back

composite number

Front

A number greater than 0 that has more than two different factors.

Back

data

Front

A collection of information gathered for a purpose. Data may be in the form of either words or numbers.

Back

benchmark fraction

Front

Fractions that are commonly used for estimation.

Back

divisor

Front

The number by which another number is divided.

Back

difference

Front

The amount that remains after one quantity is subtracted from another.

Back

Associative Property of Multiplication

Front

Changing the grouping of three or more factors does not change the product.

Back

centimeter (cm)

Front

A metric unit of length equal to 0.01 of a meter.

Back

compose

Front

To put together components or basic elements.

Back

cup (c)

Front

A customary unit of capacity.
1 cup = 8 fluid ounces.

Back

congruent

Front

Having exactly the same size and shape.

Back

area

Front

The measure, in square units, of the inside of a plane figure.

Back

circle

Front

A plane figure with all points the same distance from a fixed point called a center.

Back

decimal notation

Front

A number containing a decimal point.

Back

equation

Front

A mathematical sentence with an equals sign. The amount on one side of the equals sign has the same value as the amount on the other side.

Back

expanded form

Front

A way to write numbers that shows the place value of each digit.

Back

equivalent fractions

Front

Fractions that have the same value.

Back

angle measure

Front

The measure of the size of an angle. It tells how far one side is turned from the other side. A one degree angle turns through 1/360 of a full circle.

Back

expression

Front

A mathematical phrase without an equal sign.

Back

addend

Front

Any number being added.

Back

evaluate

Front

To find the value of a mathematical expression.

Back

area model

Front

A model of multiplication that shows each place value product.

Back

decimal

Front

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

Back

denominator

Front

The quantity below the line in a fraction. It tells how many equal parts are in the whole.

Back

Associative Property of Addition

Front

Changing the grouping of three or more addends does not change the sum.

Back

equal

Front

Having the same value.

Back

Commutative Property of Addition

Front

Changing the order of the addends does not change the sum.

Back

decimal point

Front

A dot (.) separating the whole number from the fraction in decimal notation.

Back

angle

Front

Two rays that share an endpoint.

Back

Distributive Property

Front

When one of the factors of a product is a sum, multiplying each addend before adding does not change the product.

Back

common denominator

Front

For two or more fractions, a common denominator is a common
multiple of the denominators.

Back

Section 2

(50 cards)

less than

Front

Less than is used to compare two numbers when the first number is smaller than the second number.

Back

fracton

Front

A way to describe a part of a whole or a part of a group by using equal parts.

Back

formula

Front

A rule that is written as an equation.

Back

line of symmetry

Front

A line that divides a figure into two congruent halves that are mirror images of each other.

Back

greater than

Front

Greater than is used to compare two numbers when the first number is larger than the second number.

Back

kilogram (kg)

Front

A metric unit of mass equal to 1000 grams.

Back

inch (in)

Front

A customary unit of length.
12 inches = 1 foot.

Back

factor

Front

The whole numbers that are multiplied to get a product.

Back

hundredth

Front

One of the equal parts when a whole is divided into 100 equal parts.

Back

line segment

Front

A part of a line with two endpoints.

Back

multiply

Front

The operation of repeated addition of the same number.

Back

gallon (gal)

Front

A customary unit of capacity.
1 gallon = 4 quarts.

Back

Order of Operations

Front

A set of rules that tells the order in which to compute.

Back

parentheses
( )

Front

Used in mathematics as grouping symbols for operations. When simplifying an expression, the operations within the parentheses are performed first.

Back

liter (L)

Front

The basic unit of capacity in the metric system.
1 liter = 1,000 milliliters.

Back

millimeter (mm)

Front

A metric unit of length. 1,000 millimeters = 1 meter

Back

obtuse angle

Front

An angle with a measure greater than 90º but less than 180º.

Back

inverse operations

Front

Operations that undo each other.

Back

mixed number

Front

A number that has a whole number (not 0) and a fraction.

Back

gram (g)

Front

The standard unit of mass in the metric system. 1,000 grams = 1 kilogram

Back

mile

Front

A customary unit of length.
1 mile = 5,280 feet

Back

ounce (oz)

Front

A customary unit of weight equal to one sixteenth of a pound. 16 ounces = 1 pound.

Back

line plot

Front

A diagram showing frequency of data on a number line.

Back

perpendicular lines

Front

Two intersecting lines that form right angles.

Back

minute (min)

Front

One sixtieth of an hour or 60 seconds.

Back

pattern

Front

A repeating or growing sequence or design. An ordered set of numbers or shapes arranged according to a rule.

Back

function table

Front

A table that lists pairs of numbers that follow a rule.

Back

mass

Front

The amount of matter in an object. Usually measured by comparing with an object of known mass. While gravity influences weight, it does not affect mass.

Back

parallel lines

Front

Lines that are always the same distance apart. They do not intersect.

Back

length

Front

How long something is. The distance from one point to another.
Length is measured in units such as inches, feet, centimeters, etc.

Back

numerator

Front

The number written above the line in a fraction. It tells how many equal parts are described in the fraction.

Back

kilometer (km)

Front

A metric unit of length equal to 1000 meters.

Back

period

Front

In a large number, periods are groups of 3 digits separated by commas or by spaces.

Back

like denominators

Front

Denominators in two or more fractions that are the same.

Back

foot (ft)

Front

A customary unit of length.
1 foot = 12 inches.

Back

Identity Property of Multiplication

Front

If you multiply a number by one, the product is the same as that number.

Back

intersecting lines

Front

Lines that cross at a point.

Back

hundredths

Front

In the decimal numeration system, hundredths is the name of the next place to the right of tenths.

Back

perimeter

Front

The distance around the outside of a figure.

Back

improper fraction

Front

A term for a fraction whose numerator is greater than or equal to its denominator.

Back

multiplicative comparison

Front

Compare by asking or telling how many times more one amount is as another. e.g. 4 times greater than.

Back

Identity Property of Addition

Front

If you add zero to a number, the sum is the same as that number.

Back

line

Front

A set of connected points continuing without end in both directions.

Back

hour (hr)

Front

A unit of time.
1 hour = 60 minutes.
24 hours = 1 day.

Back

multiple

Front

A product of a given whole number and any other whole number.

Back

number line

Front

A diagram that represents numbers as points on a line.

Back

milliliter (mL)

Front

A metric unit of capacity.
1,000 milliliters = 1 liter.

Back

meter (m)

Front

A standard unit of length in the metric system.

Back

metric system

Front

A system of measurement based on tens. The basic unit of capacity is the liter. The basic unit of length is the meter. The basic unit of mass is the gram.

Back

factor pairs

Front

A set of two whole numbers when multiplied, will result in a given product.

Back

Section 3

(39 cards)

reasonableness

Front

An answer that is based on good number sense.

Back

product

Front

The answer to a multiplication problem.

Back

two-dimensional

Front

Having length and width. Having area, but not volume. Also called a plane figure.

Back

pound (lb)

Front

A customary unit of weight.
1 pound = 16 ounces.

Back

right triangle

Front

A triangle that has one 90º angle.

Back

range

Front

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

Back

sequence

Front

A set of numbers arranged in a special order or pattern.

Back

ray

Front

A part of a line that has one endpoint and goes on forever in one direction.

Back

plane figure

Front

A two-dimensional figure.

Back

second (sec)
(unit of time)

Front

One sixtieth of a minute. There are 60 seconds in a minute.

Back

protractor

Front

A tool used to measure and draw angles.

Back

unlike denominators

Front

Denominators that are not equal.

Back

pint (pt)

Front

A customary unit of capacity.
1 pint = 2 cups

Back

place value

Front

The value of the place of a digit in a number.

Back

point

Front

The exact location in space represented by a dot.

Back

round a whole number

Front

To find the nearest ten, hundred, thousand, (and so on).

Back

simplify

Front

To express a fraction in simplest form.

Back

standard form

Front

A common or usual way of writing a number using digits.

Back

quart (qt)

Front

A customary unit of capacity.
1 quart = 2 pints
or
1 quart = 4 cups

Back

yard (yd)

Front

A customary unit of length.
1 yard = 3 feet or 36 inches.

Back

simplest form

Front

When a fraction is expressed with the fewest possible pieces, it is in simplest form. (Also called lowest terms.)

Back

remainder

Front

The amount left over when one number is divided by another.

Back

unit fraction

Front

A fraction that has 1 as its numerator.

Back

word form

Front

A way of using words to write a number.

Back

quotient

Front

The answer to a division problem.

Back

weight

Front

The measure of how heavy something is.

Back

right angle

Front

An angle that measures exactly 90º.

Back

variable

Front

A letter or symbol that represents a number.

Back

vertex

Front

The point at which two line segments, lines, or rays meet to form an angle.

Back

square unit

Front

A unit, such as square centimeter or square inch, used to measure area.

Back

whole numbers

Front

Whole numbers are zero and the counting numbers 1, 2, 3, 4, 5, 6, and so on. If a number has a negative sign, a decimal point, or a part that's a fraction, it is not a whole number.

Back

subtract

Front

An operation that gives the difference between two numbers. Subtraction can be used to compare two numbers, or to find out how much is left after some is taken away.

Back

sum

Front

The answer to an addition problem.

Back

time interval

Front

A duration of a segment of time.

Back

prime number

Front

A whole number greater than 0 that has exactly two different factors, 1 and itself.

Back

Zero Property of Multiplication

Front

The product of any number and zero is zero.

Back

related facts

Front

Related addition and subtraction facts or related multiplication and division facts.
Also called fact family.

Back

volume

Front

The number of cubic units it takes to fill a figure.

Back

tenth

Front

One of the equal parts when a whole is divided into 10 equal parts.