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 6: Word List - Math
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base number
the number that is going to be raised to a power
circumference
boundary line of a circle, figure, area, or object
complement
complete; consummate; make perfect
convert
change something into another form; transform
coordinate plane
coordinate system that specifies each point uniquely in a plane by a pair of numerical coordinates
diameter
length of straight line passing through the center of a circle and connecting two points on the circumference
evaluate
judge; examine and judge carefully; appraise
factorization
the resolution of an entity into factors such that when multiplied together they give the original entity
non-terminating decimal
a decimal numeral that does not terminate in an infinite sequence
numerical expression
combines numbers, variables, or constants using operators
pi
the ratio of a circle's circumference to its diameter; equal to 3.14159265358979323846...
plane figure
a two-dimensional shape
prime factor
the prime factors of a quantity are all of the prime quantities that will exactly divide the given quantity
right line drawn or extending from the center of a circle to the periphery
reciprocal
concerning each of two or more persons or things; exchangeable; interacting
sequences
the action of following in order; serial arrangement in which things follow in logical order or a recurrent pattern
similarity
the quality of being similar
simplify
make simple; make less complex; make clear by giving the explanation for
square units
unit used to measure area
substitution
the act of putting one thing or person in the place of another; an event in which one thing is substituted for another
supplement