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### 75 Cards in this Set

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 Whole Numbers zero and the counting numbers: 1,2,3,4,5,6 and so on Inequality a mathermatical sentence that compares two unequal expressions using symbols - less than, greater than, not equal Place Value the value of a digit based on its position in a number Expanded Form a number written as the sum of the value of it digits 4,000 + 300 + 90 + 2 Digit any of the ten symbols 0,1,2,3,4,5,6,7,8,9 Rounding expressing a number to the nearest ten, hundred, and thousand Period a group of 3 digits separated from tother digits of a number by a comma ones, thousands, millions, billions Word Form a number written as words four thousand, three hundred ninety-two Standard Form a number written with one digit for each place value 4,392 Equation a number sentence with an equal sign; the amount on one side of the equal sign has the same value as the amount on the other side Compatible Numbers numbers that are easy to work with mentally Decompose breaking apart numbers into smaller parts Estimate an approximate rather than an exact answer Sum/Difference the answers in addition and subtraction Regroup to use 1 ten to form 10 ones; 1 hundred to form 10 tens; 1 thousand to form 10 hundreds Product the answer to a multiplication problem Factors the numbers that are multiplied to give a product Array an arrangement of objects or numbers in rows and columns Multiple the product of a whole number and any other whole number Clustering using numbers that are close to a rounded number to make estimation easier Quotient the answer to a division problem Remainder the number that is left after dividing Multiplication the operation (x) of two or more numbers, called factors, to find a product Division the operation of making equal groups Dividend the number to be divided Divisor a number by which another number is divided Divisible capable of being divided without a remainder Prime Number a number that has exactly two different factors, itself and 1 Composite Number a number that has more than two factors Improper Fraction a fraction in which the numerator is greater than or equal to the denominator; its value is greater than or equal to 1 Equivalent Fractions fraction that have different numerators and denominators but name the same numbers Proper Fractions a fraction whose numerator is smaller than its denominator Mixed Decimal a whole number and a decimal Numerator the number that tells how many equal parts are described by the fraction Unit Fraction the name of each equal part; it has one as the numerator Mixed Number a number written as a whole number and a fraction Equivalent Decimals decimals that name the same number Whole Number any of the numbers 0, 1, 2, 3, and so on Outcome the result of a probability experiment Double Bar Graph a graph in which data is compared by means of pairs of rectangular bars drawn next to each other Probability the chance that an event will occur Scale a system of marks at fixed intervals used in measurment and graphing Data information that is gathered Bar Graph a graph with bars of different lengths to show information Tree Diagram a diagram that shows combinations of outcomes of an event Sample a number of people, objects, or events chosen from a given population to represent the entire group Elapsed Time the amount of time that has passed Unit a precisely fixed quantity used to measure Perimeter the distance around a figure A.M. used to show time between midnight and noon P.M. used to show the time between noon and midnight Acute Angle an angle with a measure of less than 90 degrees Right Angle an angle with a measure of exactly 90 degrees Obtuse Angle an angle with a measure that is greater than 90 degrees Parallel Lines lines that are the same distance apart at all points. These lines will never intersect. Perpendicular Lines lines that intersect to form right angles Intersecting Lines lines that meet or cross at a point Point an exact location in space Line an endless collection of points along a straight path that goes on forever Line Segment part of a line that has 2 endpoints Line of Symmetry a line that divides a figure into two congruent halves that are mirror images of each other Plane Figure any 2-dimensional figure such as circles and polygons Space/Solid Figure a geometric figure with 3 dimensions Geometry the mathematics of the properties and relationships of points, lines, angles, surfaces, and solids Prism a solid that is formed by the union of all the line segments that connect corresponding points on two congruent polygons that are located in parallel planes Pyramid a space figure whose base is a plane figure and whose faces are triangles with a common corner Base the flat side of a cylinder or cone: the flat side of a polyhedron that gives the shape its name Quadrilateral a polygon with 4 sides Customary System a measurement system that measures length in inches, feet, yards, and miles; capacity in cups, pints, quarts, and gallons; weight in ounces, pounds, and tons; and temperature in degrees Fahrenheit Metric System (SI) a measurement system that measures length in millimeters, centimeters, meters, and kilometers; capacity in millimeters and liters; mass in grams and kilograms; and temperature in degrees Celsius Capacity the maximum amount that can be contained by an object; often refers to measurement of a liquid Area the measure, in square units, of the interior region of a 2-dimensional figure or the surface of a 3-dimensional figure Mass the amount of matter in an object Length the distance along a line or figure from one point to another Weight a measure of the heaviness of an object