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Math Vocab 6th Grade

Lessons 1-20 & Investigations 1 & 2

TermDefinition
Addends One of two or more numbers that are added to find a sum
Counting numbers The numbers used to count; the members of the set {1,2,3,4,5,...}. Also called natural numbers.
Decimal point The symbol in a decimal number used as a reference point for place value.
Difference The result of subtraction.
Dividend A number that is divided.
Divisor A number by which another number is divided; a factor of a number.
Evaluate To find the value of an expression
Factors One of two or more numbers that are multiplied; a whole number that divides another whole number without a remainder; to write as a product of factors
Minuend A number from which another number is subtracted
Natural numbers The numbers used to count; the members of the set {1,2,3,4,5,...}. Also called counting numbers
Operations of Arithmetic The four basic mathematical operations; addition, subtraction, multiplication, and division.
Product The result of multiplication.
Quotient The result of division.
Subtrahend A number that is subtracted.
Sum The result of addition.
Variable A quantity that can change or assume different variables.
Whole numbers The numbers of the set {0,1,2,3,4,...}.
Align To arrange in a line.
Additive Identity The number 0. The sum of any number and 0 is equal to the initial number. In symbolic form, a + 0 = a.
Associative Property of Addition The grouping of addends does not affect their sum. In symbolic form a + (b + c) = (a + b) +c.
Associative Property of Multiplication The grouping of factors does not affect their product. In symbolic form a x (b x c) = (a x b) x c.
Commutative Property of Addition Changing the order of addends does not change their sum. a + b = b = a
Commutative Property of Multiplication Changing the order of factors does not change their product. a x b = b x a
Fact Family A group of numbers related by addition and subtraction or by multiplication and division. Four mathematical fact statements can be formed using the numbers in a fact family.
Identity Property of Addition The sum of any number and 0 is equal to the initial number. a + 0 = a
Identity Property of Multiplication The product of any number and 1 is equal to the initial number. a x 1 = a
Inverse Operations Operations that undo one another.
Multiplicative Identity The number 1.
Zero Property of Multiplication Zero times any number is zero. 0 x a = 0
Equation A statement that uses the symbol "=" toe how that two quantities are equal.
Variable A quantity that can change or assume different values. Also, a letter used to represent an unknown in an expression or equation.
Unknown A variable, or the quantity it represents.
Compare Looking at two numbers to find out if one number is greater than, less than, or equal to another number.
Comparison Symbol The symbol used to show the comparison of two numbers: greater than (>), less than (<), or equal (=). The pointed end of the symbol points to the lesser number.
Geometric Sequence A sequence whose terms share a common ratio. In the sequence {2,4,8,16,32,...} each term can be multiplied by 2 to find the next term.
Integers The set of counting numbers, their opposites, and zero; the members of the set {...,-2,-1,0,1,2,...}.
Negative Numbers Numbers less than zero
Number Line A line for representing and graphing numbers. Each point on a line corresponds to a number.
Origin The location of the number 0 on a number line; the point (0,0) on a coordinate plane.
Perfect squares The product when a whole number is multiplied by itself.
Positive numbers Numbers greater than zero
Sequence A list of numbers arranged according to a certain rule
Terms A numbers that serves as a numerator or denominator of a fraction; one of the numbers in a sequence; a constant or variable expression composed of one or more factors in an algebraic expression
Infinite Endless
Expanded Notation A way of writing a number as the sum of the products of the digits and the place values of the digits.
Place value The value of a digit based on its position within a number.
Divisible Able to be divided by a whole number without a remainder
Divisibility Tests Testing the divisibility of a number without actually dividing
Greatest Common Factor (GCF) The largest whole number that is a factor of two or more indicated numbers
Factors One of two or more numbers that are multiplied; a whole number that divides another whole number without a remainder; to write as a product of factors
Acute angle an angle whose measure is between 0 degrees and 90 degrees
Angle The opening that is formed when two lines, rays, or segments intersect
Geometry A major branch of arithmatics that deals with shapes, sizes, and other properties of figures.
Intersect to share a common point or points
Line a straight collection of points extending in opposite directions
Oblique lines lines that are neither vertical or horizontal
Obtuse angle an angle whose measure is between 90 degrees and 180 degrees
Parallel lines lines in the same planethat do not intersect
Perpendicular lines Two lines that intersect at right angles
Plane In geometry, a flat surface that has no boundaries
Point An exact position on a line, on a plane, or in space
Ray A part of a line that begins at a point and continues without end in one direction
Right angle An angle that forms a square corner and measures 90 degrees, often marked with a small square
Segment A part of a line with two distinct endpoints
Skew lines In 3-dimensional space, lines that do not intersect and are not in the same plane
Straight lines shortest difference between any two points on a plane
Vertex A point of an angle, polygon, or polyhedron where two or more lines, rays, or segments meet
Oblique Indirect or evasive, slanting
Denominator The bottom term of a fraction
Fractions A number that names part of a whole
Mixed number A whole number and a fraction together
Numerator The top term of a fraction
Percents A fraction whose denominator of 100 is expressed as a % sign
Common denominator A common multiple of the denominators of two or more fractions
Inverse Property of Multiplication The product of a number and its reciprocal equals 1
Reciprocal Two numbers whose product is 1
Adjacent Next to
Convert To change in the form of a measurement or different units, without a change in the size or amount
Improper Fractions A fraction with a numerator equal to or greater than the denominator
Probability A way of describing the likelihood of an event; the ratio of favorable outcomes to all possible outcomes
Complement of an event All outcomes that are not the event
Equivalent fractions Different fractions that name the same amount
Lowest terms When the only common factor of the numerator and denominator is 1
Terms numbers that serve as numerators or denominators in fractions; one of the numbers in a sequence; a constant or variable expression composed of one or more factors in an algebraic expression
Function The rule for using one number (an input) to calculate another number (an output)
U.S. Customary System A system of measurements used almost exclusively in the United States
Capacity The amount a container can hold when filled
12 inches 1 foot
3 feet 1 yard
1,760 yards 1 mile
5,280 feet 1 mile
8 ounces 1 cup
2 cups 1 pint
2 pints 1 quart
4 quarts 1 gallon
212 degrees Fahrenheit Temperature at which water boils
98.6 degrees Fahrenheit Normal body temperature
68 degrees Fahrenheit Room temperature
32 degrees Fahrenheit Temperature at which water freezes
Degrees Units for measuring angles; units for measuring temperatures
Protractor A tool that is used to measure and draw angles
Vertex A point of an angle, polygon,or polyhedron where two or more lines, rays, or segments meet
Congruent Having the same size and shape
Corresponding parts Sides or angles of similar polygons that occupy the same relative positions
Polygon A closed, flat shape with straight sides
Regular polygon A polygon in which all sides have equal length and all angles have equal measures
Similar Having the same shape but not necessarily the same size, corresponding parts are proportional
Perimeter The distance aroun a closed, flat shape
Area The size of the inside of a flat shape, measured in square units
Base A designated side (or face) of a geometric figure; the lower number in an exponential expression
Exponent The upper number in an exponential expression that shows how many times the base is to be used as a factor
Exponential expressions An expression that indicates that the base is sot be used as a factor the number of times shown by the exponent
Square root One of two equal factors of a number
Area formula for a rectangle length x width
Area formula for a square side x side
Arc Part of a circle
Center The point inside a circle or sphere from which all points on the circle or sphere are equally distant.
Central angle An angle whose vertex is the center of the circle.
Chord A segment whose endpoints lie on a circle.
Circle A closed, curved shape in which all points on the shape are the same distance from its center.
Circumference The perimeter of a circle
Compass A tool used to draw angles and arcs
Concentric circles Two or more circles with a common center
Diameter The distance across a circle through its center
Hexagon Six-sided polygon
Inscribed A polygon within another shape when all points of the polygon lie within the other shape, and all of the polygon's vertices lie on the other shape.
Radius (radii) The distance from the center of the circle or sphere to a pony on the circle or sphere.
Semicircle A half circle
Created by: joshjh