5th Grade Math Vocabulary

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Vocabulary flashcards covering 5th Grade Mathematics terms across data analysis, number sense, computation, measurement, geometry, and algebraic reasoning.

Last updated 1:40 PM on 9/14/26
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38 Terms

1
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Mean

Fair share or average of a data set.

<p>Fair share or average of a data set.</p>
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Median

The middle value of a data set in ranked order.

<p>The middle value of a data set in ranked order.</p>
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Mode

Data that occurs most frequently in a set.

<p>Data that occurs most frequently in a set.</p>
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Range

The spread of a set of data.

<p>The spread of a set of data.</p>
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Line Plot

A graph that shows data along a number line using symbols such as XX to represent frequency.

<p>A graph that shows data along a number line using symbols such as $$X$$ to represent frequency.</p>
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Stem-and-Leaf Plot

A display that organizes numerical data by place value into stems and leaves.

<p>A display that organizes numerical data by place value into stems and leaves.</p>
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Prime Number

Has exactly 22 different factors, 11 and itself.

<p>Has exactly $$2$$ different factors, $$1$$ and itself.</p>
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Composite Number

Has factors other than 11 and itself.

<p>Has factors other than $$1$$ and itself.</p>
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Product

The answer to a multiplication problem.

<p>The answer to a multiplication problem.</p>
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Quotient

The answer to a division problem.

<p>The answer to a division problem.</p>
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Factor

The numbers that multiply to a product.

<p>The numbers that multiply to a product.</p>
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Divisor

The number dividing another number.

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Dividend

The number being divided.

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Remainder

The amount left over when a number cannot be equally divided into another.

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Expression

A representation of a quantity.

<p>A representation of a quantity.</p>
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Equation

A mathematical sentence stating that two expressions are equal.

<p>A mathematical sentence stating that two expressions are equal.</p>
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Mixed Number

A number written as a whole number and a fraction.

<p>A number written as a whole number and a fraction.</p>
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Sample Space

A list or diagram showing all possible outcomes of an event.

<p>A list or diagram showing all possible outcomes of an event.</p>
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Numerator

The number of equal parts being considered in a fraction.

<p>The number of equal parts being considered in a fraction.</p>
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Denominator

The number of equal parts in the whole in a fraction.

<p>The number of equal parts in the whole in a fraction.</p>
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Proper Fraction

Fraction less than 11 where the numerator is less than the denominator.

<p>Fraction less than $$1$$ where the numerator is less than the denominator.</p>
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Improper Fraction

Fraction greater than or equal to 11 where the numerator is equal to or greater than the denominator.

<p>Fraction greater than or equal to $$1$$ where the numerator is equal to or greater than the denominator.</p>
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Least Common Multiple

The smallest common multiple shared by two or more numbers.

<p>The smallest common multiple shared by two or more numbers.</p>
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Greatest Common Factor

The largest factor shared by two or more numbers.

<p>The largest factor shared by two or more numbers.</p>
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Area

The number of square units needed to cover a surface or plane figure.

<p>The number of square units needed to cover a surface or plane figure.</p>
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Perimeter

The measure of the path or distance around any plane figure in units.

<p>The measure of the path or distance around any plane figure in units.</p>
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Volume

The measure of capacity of a 3-D3\text{-D} figure measured in cubic units.

<p>The measure of capacity of a $$3\text{-D}$$ figure measured in cubic units.</p>
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Acute Angle

An angle measuring less than 90∘90^{\circ}.

<p>An angle measuring less than $$90^{\circ}$$.</p>
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Obtuse Angle

An angle measuring greater than 90∘90^{\circ}.

<p>An angle measuring greater than $$90^{\circ}$$.</p>
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Right Angle

An angle measuring exactly 90∘90^{\circ}.

<p>An angle measuring exactly $$90^{\circ}$$.</p>
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Straight Angle

An angle measuring exactly 180∘180^{\circ}.

<p>An angle measuring exactly $$180^{\circ}$$.</p>
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Acute Triangle

A triangle in which all angles are less than 90∘90^{\circ}.

<p>A triangle in which all angles are less than $$90^{\circ}$$.</p>
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Obtuse Triangle

A triangle in which one angle is greater than 90∘90^{\circ}.

<p>A triangle in which one angle is greater than $$90^{\circ}$$.</p>
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Right Triangle

A triangle in which one angle is exactly 90∘90^{\circ}.

<p>A triangle in which one angle is exactly $$90^{\circ}$$.</p>
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Equilateral Triangle

A triangle where all 33 sides are equal.

<p>A triangle where all $$3$$ sides are equal.</p>
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Scalene Triangle

A triangle where all 33 sides are not equal.

<p>A triangle where all $$3$$ sides are not equal.</p>
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Isosceles Triangle

A triangle where 22 sides are equal.

<p>A triangle where $$2$$ sides are equal.</p>
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Variable Expression

An expression that contains numbers, operations, and variables.