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Forms of Numbers Expanded notation form, Picture Form, Word Form, Standard form Place Value The position of a single digit in a whole number or decimal number containing one or more digits. Base Ten Blocks Blocks which show base 10 number values. Venn Diagram A diagram using circles or other shapes to show the relationship between sets Add Putting numbers together. Compose Putting numbers together to make them easier to work with Decompose Breaking a number apart to make it easier to work with Subtract To Take numbers apart Multiply A mathematical operation where a number is added to itself a number of times Divide Sharing or Grouping a number into equal parts. Estimate The use of rounding and/or other strategies to make an educated guess or reasonably accurate approximation. Approximately/About An answer close to the exact answer. Usually found by rounding to the nearest 10 or 100. Less Than/Greater Than Symbol used to compare relationships of inequalities. Equal to/not equal to Symbols used to determine relationships of equalities. Multiply Combining Numbers of multiple groups array A set of objects or numbers arranged in rows and columns. Factors Numbers that divide exactly into another number. Multiples Number that results from multiplying a given number by a set of whole numbers. Pattern An ordered set of numbers, shapes, or other mathematical objects, arranged according to a rule. Division Vocabulary Dividend Divisor Quotient Remainder Amount left over after dividing a number Fraction Equal parts of a whole or group written with a numerator and a denominator. Fractions Denominator: number of parts Numerator: number of each part Proper fraction Improper fraction mixed number Equivalent Having the same amount or value; the state of being equal. Equivalent Fractions Fractions that are the same or equal Number Line A line on which numbers, and fractions can be compared and ordered. Order of Operations The order in which operations should be done.