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.