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**6 - 8**

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****A**

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acute angle
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acute triangle
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add
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addend
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addition
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addition sentence
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adjacent angles
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after
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algebraic expression
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algebraic operating system (AOS)
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angle
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area
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array
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associative property of addition
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associative property of multiplication
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average
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axis (plural axes)
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****B**

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balance
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bar graph
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base (in a number system)
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base (in plane geometry)
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base (in solid geometry)
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base unit
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before
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benchmark number
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between
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biased sample
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billion
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bisect
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****C**

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calendar
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capacity
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cardinal number
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cell
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center (of a circle)
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centimeter (cm)
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certain
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chord
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circle
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circle graph
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circumference
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closed figure
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clustering
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common factor (in arithmetic)
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common fraction
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common multiple
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commutative property of addition
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commutative property of multiplication
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compass
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compatible numbers
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complementary angles
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composite number
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compound event
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cone
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congruent figures
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congruent polygons
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convenience sample
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coordinate plane
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coordinates
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corner
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count back
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count on
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cross multiply (cross products)
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cube (in geometry)
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cubic unit
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cumulative frequency
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cup (c)
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customary measurement system
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cylinder
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****D**

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data
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decimal
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decimal fraction
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decimal number system
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decimal point
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decimeter
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degree (°)
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degrees Celsius (°C)
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degrees Fahrenheit (°F)
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denominator
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dependent event
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diameter of a circle
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diameter of a sphere
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difference
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digit
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dime
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dimension (in geometry)
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discount
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distributive property of multiplication over addition
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divide
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dividend
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divisible
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division
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divisor
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dodecahedron
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dollar
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double
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double bar graph
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double minus one
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double plus one
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****E**

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edge
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elapsed time
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equal
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equal groups
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equal parts
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equally likely
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equation
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equilateral triangle
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equivalent
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equivalent fractions
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equivalent ratios
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estimate
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evaluate
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even number
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event
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expanded form
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experiment
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exponent
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expression
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****F**

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face
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fact family
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factor (in arithmetic)
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factor tree
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fair
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fewer
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Fibonacci sequence
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flip
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foot (ft)
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formula
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fraction
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frequency
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frequency table
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****G**

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gallon (gal)
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golden ratio
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golden rectangle
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gram (g)
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greater than (>)
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greatest common factor (GCF)
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grid
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grouping property of addition
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grouping property of multiplication
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****H**

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half-dollar
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half-hour
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height
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hexagon
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histogram
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horizontal
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horizontal bar graph
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hour
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hour hand
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hundred
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hundredth
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****I**

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identity property of one
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identity property of zero
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impossible
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inch (in.)
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independent event
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indirect measurement
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inequality
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inside
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integer
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intersecting lines
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interval
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inverse operations (opposite operations)
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isosceles triangle
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****K**

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key
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kilogram (kg)
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kiloliter (kL)
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kilometer (km)
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****L**

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lateral face
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least common denominator (LCD)
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least common multiple (LCM)
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less than (<)
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line
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line graph
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line segment
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line symmetry
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liter (L)
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lower extreme
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****M**

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map scale
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mean (average)
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median
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meter (m)
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metric system
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mile (mi)
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milligram (mg)
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milliliter (mL)
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millimeter (mm)
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minus sign
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minute (min)
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minute hand
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mixed decimal
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mixed number
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mode
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more than
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multiple
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multiple-bar graph
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multiple-line graph
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multiplication
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multiplication sentence
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multiply
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****N**

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negative integer
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negative number
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net (in geometry)
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nickel
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number line
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number sentence
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numerator
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numerical expression
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****O**

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obtuse angle
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obtuse triangle
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octagon
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octahedron
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odd number
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on
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one-dimensional
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ones
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open figure
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opposite operations
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opposites
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order of operations
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order property of multiplication
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ordered pair
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ordinal numbers
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origin
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ounce (oz)
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outcomes
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outside
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****P**

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parallel lines
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parallelogram
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partial product
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pattern
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penny
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pentagon
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percentage
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perimeter
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period
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perpendicular lines
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pi
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pictogram
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pie chart
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pint (pt)
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place value
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plane
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plane figure
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plus sign
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point
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point of rotation
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point symmetry
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polygon
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polyhedron
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positive integer
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positive number
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pound (lb)
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precision
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predict
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prediction
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prime factorization
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prime number
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prism
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probability
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product
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property of one for multiplication
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property of zero
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proportion
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protractor
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pyramid
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****Q**

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quadrant
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quadrilateral
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quart (qt)
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quarter
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quotient
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****R**

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radius (of a circle)
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random sampling
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range
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rate
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ratio
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rational number
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ray
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reciprocal
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rectangle
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rectangular prism
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reflection (flip)
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regrouping
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regular polygon
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relation
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remainder
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repeating decimal
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result
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rhombus
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right angle
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right triangle
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rotation
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rotational symmetry
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rounding
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****S**

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sample
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sample space
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scale
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scale drawing
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scalene triangle
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scientific notation
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sequence (progression)
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side
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simple interest
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simplest form
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skip count
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slide
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solid figure
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solution
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solve
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sphere
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square (in geometry)
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square number
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square pyramid
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square root
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square unit
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standard form
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stem-and-leaf plot
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straight angle
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subtract
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subtraction
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subtraction sentence
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sum
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supplementary angles
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surface area
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survey
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symmetry
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****T**

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table
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tally marks
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tally table
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tangram
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temperature
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tens
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tenth
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term
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terminating decimal
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tessellation
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thousandth
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three-dimensional
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ton (t)
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transformation (in geometry)
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translation (slide)
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trapezoid
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tree diagram
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triangle
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triangular number
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two-dimensional
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****U**

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unit fraction
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unlike fractions
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upper extreme
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****V**

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variable
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Venn diagram
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vertex (in plane geometry)
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vertex (in solid geometry)
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vertical
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vertical angles
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vertical bar graph
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volume
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****W**

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week
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written form
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****X**

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x-axis
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x-coordinate
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****Y**

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y-axis
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y-coordinate
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yard (yd)
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****Z**

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zero
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zero property of addition
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zero property of multiplication
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