Lessons 1-20 & Investigations 1 & 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Addends | One of two or more numbers that are added to find a sum
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| Counting numbers | The numbers used to count; the members of the set {1,2,3,4,5,...}. Also called natural numbers.
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| Decimal point | The symbol in a decimal number used as a reference point for place value.
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| Difference | The result of subtraction.
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| Dividend | A number that is divided.
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| Divisor | A number by which another number is divided; a factor of a number.
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| Evaluate | To find the value of an expression
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| 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
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| Minuend | A number from which another number is subtracted
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| Natural numbers | The numbers used to count; the members of the set {1,2,3,4,5,...}. Also called counting numbers
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| Operations of Arithmetic | The four basic mathematical operations; addition, subtraction, multiplication, and division.
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| Product | The result of multiplication.
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| Quotient | The result of division.
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| Subtrahend | A number that is subtracted.
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| Sum | The result of addition.
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| Variable | A quantity that can change or assume different variables.
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| Whole numbers | The numbers of the set {0,1,2,3,4,...}.
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| Align | To arrange in a line.
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| Additive Identity | The number 0. The sum of any number and 0 is equal to the initial number. In symbolic form, a + 0 = a.
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| Associative Property of Addition | The grouping of addends does not affect their sum. In symbolic form a + (b + c) = (a + b) +c.
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| 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.
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| Commutative Property of Addition | Changing the order of addends does not change their sum. a + b = b = a
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| Commutative Property of Multiplication | Changing the order of factors does not change their product. a x b = b x a
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| 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.
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| Identity Property of Addition | The sum of any number and 0 is equal to the initial number. a + 0 = a
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| Identity Property of Multiplication | The product of any number and 1 is equal to the initial number. a x 1 = a
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| Inverse Operations | Operations that undo one another.
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| Multiplicative Identity | The number 1.
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| Zero Property of Multiplication | Zero times any number is zero. 0 x a = 0
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| Equation | A statement that uses the symbol "=" toe how that two quantities are equal.
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| Variable | A quantity that can change or assume different values. Also, a letter used to represent an unknown in an expression or equation.
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| Unknown | A variable, or the quantity it represents.
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| Compare | Looking at two numbers to find out if one number is greater than, less than, or equal to another number.
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| 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.
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| 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.
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| Integers | The set of counting numbers, their opposites, and zero; the members of the set {...,-2,-1,0,1,2,...}.
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| Negative Numbers | Numbers less than zero
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| Number Line | A line for representing and graphing numbers. Each point on a line corresponds to a number.
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| Origin | The location of the number 0 on a number line; the point (0,0) on a coordinate plane.
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| Perfect squares | The product when a whole number is multiplied by itself.
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| Positive numbers | Numbers greater than zero
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| Sequence | A list of numbers arranged according to a certain rule
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| 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
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| Infinite | Endless
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| Expanded Notation | A way of writing a number as the sum of the products of the digits and the place values of the digits.
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| Place value | The value of a digit based on its position within a number.
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| Divisible | Able to be divided by a whole number without a remainder
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| Divisibility Tests | Testing the divisibility of a number without actually dividing
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| Greatest Common Factor (GCF) | The largest whole number that is a factor of two or more indicated numbers
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| 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
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| Acute angle | an angle whose measure is between 0 degrees and 90 degrees
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| Angle | The opening that is formed when two lines, rays, or segments intersect
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| Geometry | A major branch of arithmatics that deals with shapes, sizes, and other properties of figures.
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| Intersect | to share a common point or points
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| Line | a straight collection of points extending in opposite directions
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| Oblique lines | lines that are neither vertical or horizontal
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| Obtuse angle | an angle whose measure is between 90 degrees and 180 degrees
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| Parallel lines | lines in the same planethat do not intersect
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| Perpendicular lines | Two lines that intersect at right angles
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| Plane | In geometry, a flat surface that has no boundaries
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| Point | An exact position on a line, on a plane, or in space
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| Ray | A part of a line that begins at a point and continues without end in one direction
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| Right angle | An angle that forms a square corner and measures 90 degrees, often marked with a small square
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| Segment | A part of a line with two distinct endpoints
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| Skew lines | In 3-dimensional space, lines that do not intersect and are not in the same plane
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| Straight lines | shortest difference between any two points on a plane
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| Vertex | A point of an angle, polygon, or polyhedron where two or more lines, rays, or segments meet
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| Oblique | Indirect or evasive, slanting
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| Denominator | The bottom term of a fraction
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| Fractions | A number that names part of a whole
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| Mixed number | A whole number and a fraction together
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| Numerator | The top term of a fraction
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| Percents | A fraction whose denominator of 100 is expressed as a % sign
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| Common denominator | A common multiple of the denominators of two or more fractions
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| Inverse Property of Multiplication | The product of a number and its reciprocal equals 1
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| Reciprocal | Two numbers whose product is 1
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| Adjacent | Next to
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| Convert | To change in the form of a measurement or different units, without a change in the size or amount
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| Improper Fractions | A fraction with a numerator equal to or greater than the denominator
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| Probability | A way of describing the likelihood of an event; the ratio of favorable outcomes to all possible outcomes
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| Complement of an event | All outcomes that are not the event
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| Equivalent fractions | Different fractions that name the same amount
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| Lowest terms | When the only common factor of the numerator and denominator is 1
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| 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
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| Function | The rule for using one number (an input) to calculate another number (an output)
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| U.S. Customary System | A system of measurements used almost exclusively in the United States
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| Capacity | The amount a container can hold when filled
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| 12 inches | 1 foot
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| 3 feet | 1 yard
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| 1,760 yards | 1 mile
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| 5,280 feet | 1 mile
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| 8 ounces | 1 cup
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| 2 cups | 1 pint
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| 2 pints | 1 quart
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| 4 quarts | 1 gallon
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| 212 degrees Fahrenheit | Temperature at which water boils
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| 98.6 degrees Fahrenheit | Normal body temperature
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| 68 degrees Fahrenheit | Room temperature
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| 32 degrees Fahrenheit | Temperature at which water freezes
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| Degrees | Units for measuring angles; units for measuring temperatures
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| Protractor | A tool that is used to measure and draw angles
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| Vertex | A point of an angle, polygon,or polyhedron where two or more lines, rays, or segments meet
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| Congruent | Having the same size and shape
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| Corresponding parts | Sides or angles of similar polygons that occupy the same relative positions
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| Polygon | A closed, flat shape with straight sides
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| Regular polygon | A polygon in which all sides have equal length and all angles have equal measures
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| Similar | Having the same shape but not necessarily the same size, corresponding parts are proportional
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| Perimeter | The distance aroun a closed, flat shape
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| Area | The size of the inside of a flat shape, measured in square units
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| Base | A designated side (or face) of a geometric figure; the lower number in an exponential expression
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| Exponent | The upper number in an exponential expression that shows how many times the base is to be used as a factor
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| Exponential expressions | An expression that indicates that the base is sot be used as a factor the number of times shown by the exponent
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| Square root | One of two equal factors of a number
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| Area formula for a rectangle | length x width
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| Area formula for a square | side x side
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| Arc | Part of a circle
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| Center | The point inside a circle or sphere from which all points on the circle or sphere are equally distant.
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| Central angle | An angle whose vertex is the center of the circle.
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| Chord | A segment whose endpoints lie on a circle.
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| Circle | A closed, curved shape in which all points on the shape are the same distance from its center.
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| Circumference | The perimeter of a circle
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| Compass | A tool used to draw angles and arcs
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| Concentric circles | Two or more circles with a common center
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| Diameter | The distance across a circle through its center
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| Hexagon | Six-sided polygon
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| 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.
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| Radius (radii) | The distance from the center of the circle or sphere to a pony on the circle or sphere.
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| Semicircle | A half circle
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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