Math Vocabulary ades P - 5 P 1 2 3 4 5 < Symbol used to compare two numbers with the lesser number given first > Symbol used to compare two numbers with the greater number given first a. m. The time between midnight and noon Above In a higher place Acute angle An angle with a measure of less than 90 degrees Acute triangle A triangle with no angle measuring 90 degrees or greater Add Combine two or more groups Addends The numbers that are being added, or combined together Addition Operation of combining groups to find the total amount Addition A number sentence that uses addition sentence After A number or event that comes next in a sequence; following, succeeding Analog clock Clock that shows time using hands on a circular base Angle A figure formed where two lines segments cross or meet Area The number of square units needed to cover the surface of a figure Array An arrangement that shows objects in rows and columns Associative Changing the grouping of three or more factors property of multiplication does not change the product Average One way to find a number that best represents all the numbers in a set Axis A reference line from which distances or angles are measured in a coordinate grid Balance A tool used to compare the weight of two objects Bar graph A way to show information that uses bars to represent data Base A special face of a solid figure Before A number or event that comes in front of or prior to; preceding Below In or to a lower place Between In the space, time, etc. separating two things indicates grade level/levels that use the vocabulary word Developed through Academics 2000 1
Math Vocabulary ades P - 5 P 1 2 3 4 5 Calendar A table showing a period of time organized into days, weeks, and months Capacity The amount a container can hold Cardinal A number that tells how many items are in a number group Centimeter A metric unit of length Certainty A given event will occur Chord A line segment that joins any two points on a circle Circle A plane figure with all points the same distance from a fixed point called the center. Circle graph A graph that is used to show how parts make up a whole Circumference The distance around a circle Classify Top arrange in classes or groups according to a system Closed figure A shape that begins and ends at the same point Colder Having a lower temperature Common factor A number that is a factor of two or more numbers Common A number that is a multiple of two or more multiple numbers Commutative Changing the order of the factors does not property of multiplication change the product Compass A tool used to draw a circle Compatible A pair of numbers that are easy to work with numbers mentally Composite A number greater than zero that has more than number Cone two factors A solid figure with one curved surface, one flat surface (usually circular), one curved edge, and one vertex. Congruent Having exactly the same size and shape Congruent Figures that have the same size and shape figures Corner The place where two or more edges meet Count back The way to find the difference when you subtract 1, 2, or 3 Count on The way to find the sum when one of the addends is 1, 2, or 3 Cube A solid figure with six congruent square faces Cubic unit A unit, such as a cubic centimeter or cubic inch, indicates grade level/levels that use the vocabulary word Developed through Academics 2000 2
Math Vocabulary ades P - 5 used to measure volume Customary A system of measurement using feet, pounds, gallons, or related parts Cylinder A solid figure with two circular bases that are parallel and congruent Data Information collected about people or things Day A unit of time equal to 24 hours Decimal A number that uses place value and a decimal point to show tenths, hundredths, and so on Decimal point A period used in decimal numbers to separate the whole number part from the decimal part, read as and Degree A unit for measuring angles Degree Celsius The metric unit for measuring temperature Degree The customary unit of measurement for Fahrenheit temperature Denominator Tells the total number of equal parts or groups into which the whole or group has been divided Diameter A line segment that passes through the center of a circle and has its endpoints on the circle Difference The result when one number is subtracted from another Digit Any one of the ten symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9 used to write numbers Digital clock A clock that shows time using digits Dime A coin whose value is ten cents Distributive property of multiplication When one of the factors of a product is a sum, multiplying each addend before adding does not change the product Dividend The number that is to be divided in a division problem Divisible One number is divisible by another if the remainder is zero when you divide Division The operation of splitting a set of objects or a number into equal groups Divisor The number by which another number is being divided Doubles An addition sentences where both addends are the same number Duration The time that a thing continues or lasts Early Ahead of time, before the scheduled time Edge The line segment where two faces of a solid figure meet indicates grade level/levels that use the vocabulary word Developed through Academics 2000 3 P 1 2 3 4 5
Math Vocabulary ades P - 5 P 1 2 3 4 5 Elapsed time Amount of time that passes from the start of an activity to the end of that activity Equal parts Parts of a whole that are congruent (same shape and same size) Equally likely When the outcomes of an experiment have the same chance of happening Equals Two things with the same value or amount Equation A number sentence that uses an equals sign to show that two amounts are equal. Some equations have variables Equivalent Two or more decimals that name the same decimals amount Equivalent 2 or more fractions that name the same amount fractions Estimate To find an answer that is close to the actual number by rounding Even A number that can be divided into two equal groups Event An activity that takes place Expanded form A way to write numbers by showing the value of each digit Exponent The number that tells how many equal factors there are Expression A variable or combination of variables, numbers, and operation symbols that represents a mathematical relationship Extend To make longer, stretch out, prolong Face A flat surface of a solid figure Fact family A group of facts that share the same numbers and use inverse operations Factor Any number multiplied together to find a product Fairness When one outcome is not more likely to happen than another Favorable In probability, the outcome you are interested in outcome measuring. It is not necessarily the most likely outcome Figure A shape in 2 or 3 dimensions Formula A rule that is written as an equation Fraction An equal part of a whole object or shape; a number that names part of a whole or part of a group Frequency The number of times a value occurs in a set of indicates grade level/levels that use the vocabulary word Developed through Academics 2000 4
Math Vocabulary ades P - 5 data Function A set of ordered pairs such that for any first number (the input) there is only one possible second number (the output) Geometry The strand of math that deals with measurement and comparing figures, both plane and solid aphs A picture of data or information you have collected eatest Largest, having the most value eatest The greatest number that is a factor of every common factor number in a set of numbers id A pattern of horizontal and vertical lines, usually forming squares Half-dollar A coin whose value is fifty cents Half-hour Thirty minutes Heavier Having more weight Heptagon A seven-sided polygon Hexagon A six-sided polygon Horizontal The direction from left to right Hotter Having a higher temperature Hour Sixty minutes Hour hand The short hand on a traditional clock Impossible Certainty that a given event cannot occur Inch A customary unit of length Intersecting 2 or more lines that cross at exactly one point lines Interval Distance between the numbers on the scale of a graph Inverse Opposite operations that undo each other operations Isosceles A triangle that has exactly two congruent sides triangle Late Not on time, after the scheduled time Least common The least common multiple of the denominators denominator of two or more fractions Least common The smallest common multiple of a set of two or multiple more numbers Length The distance from one point to another Less A number or set that has fewer; smaller Lighter Having less weight Like fractions Fractions with a common denominator Line A straight path in a plane, extending in both indicates grade level/levels that use the vocabulary word Developed through Academics 2000 5 P 1 2 3 4 5
Math Vocabulary ades P - 5 directions with no endpoint Line A set of connected points continuing without end in both directions Line graph A graph used to show change over time with points connected by line segments Line of A line that divides a figure into two congruent symmetry parts that are mirror images of each other Line plot A graph showing frequency of data on a number line Line segment Part of a line with two endpoints Mass The amount of matter in an object Measurement Using tools to find the size and weight of an object, temperature or time. Median The middle number when the numbers are arranged for least to greatest Metric A system of measurement based on tens Minute hand The long hand on a traditional clock Mixed decimal A number that is made up of a whole number and a decimal Mixed number A number that is made up of a whole number and a fraction Mode The number that appears most frequently in a set of numbers Month A unit of time equal to approximately 30 days More eater in amount or degree Multiple A number that is the product of a given number and a whole number Multiplication The process of finding the total number of items when joining equal groups Net A two dimensional shape that can be folded into a three dimensional shape Nickel A coin whose value is five cents Non-standard measurement Measuring objects using items not normally used to measure Number line A line with equally spaced ticks named by numbers Number An equation or a comparison sentence Numeral A symbol used to represent a number Numerator Tells how many of the equal parts of a whole or group are being considered Obtuse angle An angle whose measure is greater than 90 degrees and less than 180 degrees indicates grade level/levels that use the vocabulary word Developed through Academics 2000 6 P 1 2 3 4 5
Math Vocabulary ades P - 5 P 1 2 3 4 5 Obtuse triangle A triangle with one obtuse angle Octagon An eight-sided polygon Odd A number that cannot be divided into two equal groups Open figure A shape that does not begin and end at the same point Operation The four mathematical operations are addition, subtraction, multiplication, and division Ordered pair A pair of numbers used to locate a point on a grid Ordinal number A number that tells order or position Outcomes Possible results of an experiment Oval Shaped like an egg in a longitudinal cross section Over In, at, or to a position above p.m. Time between noon and midnight Paired numbers Numbers that have a direct relationship to each other Parallel Lines that never cross and are always the same distance apart Parallelogram Any four sided polygon with two pairs of parallel lines Pattern The repetition of numbers or objects; list of numbers that follow a rule Penny A coin whose value is one cent Pentagon A five-sided polygon Per For each Perimeter The distance around a figure Period Each group of 3 digits in a number Perpendicular Two lines that intersect to form four right angles lines Pictograph A graph that uses pictures to show and compare information Pie graph A way to show information that uses pieces of a pie, or circle, to represent information Place value The system in which the position of a digit determines its value Place value Used to understand numbers and their values chart Plane A flat surface that goes on forever in all directions Plane figure Any two-dimensional figure Point Name of a location on an object and in space Polygon A closed plane figure with straight sides indicates grade level/levels that use the vocabulary word Developed through Academics 2000 7
Math Vocabulary ades P - 5 P 1 2 3 4 5 Possible A given event might, or could, occur Predict To state what one believes will happen using information given Price The amount of money needed to purchase an item Prime number A whole number greater than zero that has exactly two different factors, 1 and itself Prism A 3-dimensional figure that has two congruent and parallel faces that are polygons. The rest of the faces are parallelograms. Probability The chance that a given event will occur Problem solving Choosing an appropriate plan to find a solution Product The answer in a multiplication problem Pyramid A polyhedron whose base is a polygon and whose other faces are triangles that share a common vertex Quadrilateral A four sided polygon Quantity An amount Quarter A coin whose value is twenty-five cents Quotient Answer to a division problem Radius Line segment with one endpoint at the center of a circle and the other endpoint on the circle Range Difference between the greatest and least numbers in a set of numbers Ray Part of a line that begins at one endpoint and extends forever in only one direction Reasonableness Deciding which answer makes the most sense Reasoning A process to determine if a solution makes sense Rectangle A plane figure with four sides and four right angles Rectangular A solid figure in which all six faces are prism rectangles Reflection The result of a figure flipped over a line Regroup To exchange amounts of equal value to rename a number Remainder The amount left over when you find a quotient Rhombus A parallelogram whose four sides are congruent and opposite angles are congruent Right angle An angle that forms a square corner and measures 90 degrees Right triangle A triangle that has one 90 degree angle Rotation The action of turning a figure around a point or vertex indicates grade level/levels that use the vocabulary word Developed through Academics 2000 8
Math Vocabulary ades P - 5 P 1 2 3 4 5 Round Finding the closest ten, hundred, thousand, etc Scale A series of numbers placed at fixed distances on a graph to help label the graph Scalene triangle A triangle that has no congruent sides Schedule A list showing when events happen Segment Part of a line, with two endpoints Sequence A set of numbers arranged in a special order or pattern Set A given number of objects; a group Shape Side Any of the line segments that form a polygon Similar figures Figures that have the same shape but may have different sizes Simplest form A fraction whose numerator and denominator have no other common factors other than one Skip count Adding the same number each time Solid figure A figure with three dimensions; not flat Sphere Any round object whose curved surface is the same distance from the center to all its points. Square A plane figure with four sides that are the same length and four right angles Square unit The unit used to measure area Standard form A way to write numbers by using digits Strategy A plan used to solve a problem Subtract Take away, remove, or compare Subtraction Operation of taking away, removing, or comparing to find a difference Subtraction A number sentence that uses subtraction sentence Sum The result when numbers are added Survey The process of asking a group of people the same question Symbol Any letter or figure used to represent an unknown number Symmetry When one half of a figure looks like the mirror image of the other half Temperature How hot or cold something is Tessellation A covering of a plane without overlaps or gaps using combinations of congruent figures Thermometer A tool used to measure temperature Three Having length, width, height, and volume dimensional Tools Devices used to solve problems indicates grade level/levels that use the vocabulary word Developed through Academics 2000 9
Math Vocabulary ades P - 5 P 1 2 3 4 5 Transformation A rule for moving every point in a plane figure to a new location Translation A transformation that slides a figure a given distance in a given direction Trapezoid A quadrilateral with only one pair of parallel sides Triangle A plane figure with three straight sides Two Having length, width, and area but not volume dimensional Under In, at, or to a position below; beneath Unlike fractions Fractions with different denominators Value The amount something is worth Venn diagram A drawing that shows in which categories numbers or objects in a set belong Vertex The point at which two rays of an angle or two or more line segments meet in a plane figure, or where 3 or more sides meet in a solid figure Vertical The direction from top to bottom Vertices The plural of vertex Volume The number of cubic units of space a solid figure takes up Week A unit of time equal to seven days Weight A measure of how heavy an object is Whole A figure that is not divided into parts Whole number A set of natural numbers using zero; any number that is not a decimal or fraction Zero property of multiplication The product of any number and zero is zero indicates grade level/levels that use the vocabulary word Developed through Academics 2000 10