Words for students from kindergarten to grade 8, each grade has 4 lists: art, math, science, and social. They are essential vocabulary for elementary academic classes.

**Grade 5: Word List - Math**

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Grade and Subject |

algebraic expression

an expression built up from constants, variables, and a finite number of algebraic operations

angle the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radians

array an orderly arrangement; an impressive display; an arrangement of aerials spaced to give desired directional characteristics

axis the center around which something rotates; pivot

central tendency a central value or a typical value for a probability distribution

composite made up of distinct parts or elements; compounded

congruence the quality of agreeing; being suitable and appropriate

customary system the system of weights and measures based on the foot and pound and second and pint that dates back to colonial America but differs in some respects from the British Imperial System

customary unit a set of units which can be used to specify anything which can be measured and were historically important, regulated and defined because of trade and internal commerce

decompose lose a stored charge, magnetic flux, or current; break down

diagonal straight line connecting any two vertices of a polygon that are not adjacent

equation making equal; equal division; equality; equilibrium

exponent one that expounds or interprets; one that speaks for, represents, or advocates

frequency the number of occurrences within a given time period

greatest common factor the largest integer that divides without remainder into a set of integers

integer any of the natural numbers (positive or negative) or zero

intercept the point at which a line intersects a coordinate axis; cause to stop on the passage

interior angle the angle inside two adjacent sides of a polygon

intersecting meet at a point

inverse opposite; reversed in order, nature, or effect; turned upside down

least common multiple the smallest multiple that is exactly divisible by every member of a set of numbers

line of symmetry symmetry with respect to reflection

metric system a decimal system of weights and measures based on the meter and the kilogram and the second

metric unit a decimal unit of measurement of the metric system (based on meters and kilograms and seconds)

ordered pair two numbers written in a certain order, usually written in parentheses like this: (4,5)

polygon a closed plane figure bounded by straight sides

prime first in excellence, quality, or value; at the best stage; peak; first in degree or rank; chief

protractor drafting instrument used to draw or measure angles

quadrilateral four-sided polygon; having four sides

rate a quantity or amount or measure considered as a proportion of another quantity or amount or measure

rotational symmetry an object that looks the same after a certain amount of rotation

square root a number that when multiplied by itself equals a given number

standard form scientific notation, where a number is written in two parts: 1)digits with the decimal point placed after the first digit, 2) X10 to a power

stem-and leaf plot a device for presenting quantitative data in a graphical format, similar to a histogram, to assist in visualizing the shape of a distribution

symmetry arrangement of parts so that balance is obtained; congruity

variables symbol representing such a quantity