6th Grade Math Vocabulary Whole Numbers Decimals Introduce Addend Decimal number Alternate interior angles Sum Decimal point Alternate exterior angles Difference Tenths Corresponding angles Missing addend Hundredths Vertical angles Regrouping Thousandths Adjacent angles Estimate Ten thousandths Supplementary angles Factor Hundred thousandths Complementary angles Product Rational numbers Multiple Statistics Integers Common Multiple Frequency Integer Average Histogram Positive Common Factor Range Negative Composite number Mean Number line Dividend Median Divisor Geometry Mode Quotient Acute angle Data Prime number Obtuse angle Graph Remainder Right angle Quadrant Least common multiple Straight angle Ordered pairs Greatest common factor Equilateral triangle Prime factorization Scalene triangle Measurement Rational numbers Isosceles triangle Customary Variable Scalene triangle Inch Inverse operations Isosceles triangle Foot Like terms Acute triangle Yard Obtuse triangle Mile Money Right triangle Gallon Discount Prism Quart Dollar Pyramid Pint Unit price Polygon Cup Change Triangle Tablespoon Deposit Quadrilateral Teaspoon Balance Parallelogram Pound Sales price Trapezoid Ounce Cents Rhombus Ton Sales tax Rectangle Metric Square Kilometer Fractions Pentagon Kilogram Fraction Hexagon Kiloliter Equivalent fractions Octagon Hectometer Terms Decagon Hectogram Higher terms N-gon Hectoliter Lower terms Plane Decameter Numerator Point Decagram Denominator Ray Deciliter Least common denominator Line Meter Lowest terms/ Line segment Gram Simplest form Angle Liter Mixed number Intersecting lines Decimeter Reciprocal Perpendicular lines] Decigram Cancel Non-perpendicular Deciliter Ratio Intersection Centimeter Proportions Congruent Centigram Rational numbers Vertex Centiliter Reduce/simplify Radius Millimeter Diameter Milligram Circumference Milliliter Pi .