📖 Math Glossary

Comprehensive definitions for 230+ K-12 math terms. Perfect for students, parents, and teachers.

230 terms available

3rd Grade 22 terms

Area and Perimeter

3rd Grade

Measuring rectangles and squares (P=2l+2w, A=lw)

P=2l+2w, A=lw

Data Interpretation

3rd Grade

Reading and creating scaled graphs

Division

3rd Grade

Repeated subtraction (÷)

÷

Division with Remainders

3rd Grade

Understanding and calculating remainders (÷)

÷

Elapsed Time

3rd Grade

Time intervals and duration

Factors and Multiples (Basic)

3rd Grade

Finding factors of numbers up to 100

Fraction Comparison

3rd Grade

Comparing fractions to determine which is larger (<, >, =)

<, >, =

Fractions

3rd Grade

Part-to-whole relationships (a/b)

a/b

Frequency Tables

3rd Grade

Organizing categorical data

Liquid Measurement

3rd Grade

Cups, pints, quarts, gallons

Measurement Conversions

3rd Grade

Converting within same system

Multiplication

3rd Grade

Repeated addition (×)

×

Multiplication Tables (Focus)

3rd Grade

Fluency with 0-12 multiplication tables (×)

×

Perimeter of Polygons

3rd Grade

Finding perimeter of various shapes (P = sum of all sides)

P = sum of all sides

Properties of Multiplication

3rd Grade

Understanding multiplication properties

Commutative, Associative, Distributive

Rounding

3rd Grade

To nearest 10 and 100

Scaled Bar Graphs

3rd Grade

Interpreting scales on bar graphs

Scaled Picture Graphs

3rd Grade

Each symbol represents multiple units

Telling Time to the Minute

3rd Grade

Reading clocks and elapsed time

Temperature

3rd Grade

Reading thermometers, Fahrenheit/Celsius

Unit Fractions

3rd Grade

Understanding 1/2, 1/3, 1/4, etc. (1/n)

1/n

Weight Measurement

3rd Grade

Ounces, pounds, grams, kilograms

5th Grade 22 terms

Coordinate Graphing

5th Grade

Plotting in first quadrant ((x,y))

(x,y)

Cubic Units

5th Grade

Understanding volume units (units³)

units³

Data and Graphs

5th Grade

Histograms, line graphs, stem-and-leaf plots

Decimal Operations

5th Grade

Operations with decimals (+, -, ×, ÷)

+, -, ×, ÷

Division of Decimals

5th Grade

Dividing with decimal divisors (÷)

÷

Exponents (Introduction)

5th Grade

Powers of 10 and basic exponent notation (10ⁿ)

10ⁿ

Expressions

5th Grade

Writing and evaluating numerical expressions

Fraction Addition and Subtraction

5th Grade

Adding and subtracting unlike denominators (a/b ± c/d)

a/b ± c/d

Fraction Multiplication and Division

5th Grade

Multiplying and dividing fractions ((a/b) × (c/d), (a/b) ÷ (c/d))

(a/b) × (c/d), (a/b) ÷ (c/d)

Fraction to Decimal Conversion

5th Grade

Converting between fractions and decimals (÷)

÷

Fraction Word Problems

5th Grade

Solving real-world problems with fractions

Part = Fraction × Whole, Whole = Part ÷ Fraction

Line Graphs

5th Grade

Creating and interpreting trends over time

Mean (Average)

5th Grade

Calculating and interpreting mean (sum ÷ count)

sum ÷ count

Measurement Conversion

5th Grade

Converting between different units

Numerical Patterns

5th Grade

Identifying rules and sequences

Order of Operations

5th Grade

Sequence of operations (PEMDAS)

PEMDAS

Order of Operations (PEMDAS)

5th Grade

Parentheses, exponents, multiplication/division, addition/subtraction (PEMDAS)

PEMDAS

Percentage Basics

5th Grade

Understanding percent as per hundred (%)

%

Powers of 10

5th Grade

Multiplying/dividing by powers of 10 (10^n)

10^n

Prime Numbers

5th Grade

Numbers divisible only by 1 and itself

Three-Dimensional Figures

5th Grade

Identifying prisms, pyramids, cylinders, cones, spheres

Volume of Rectangular Prisms

5th Grade

Three-dimensional measurement (V = l × w × h)

V = l × w × h

6th Grade 23 terms

Absolute Value

6th Grade

Distance from zero (|x|)

|x|

Area of Triangles and Polygons

6th Grade

Area of triangles and composite shapes (A = ½bh)

A = ½bh

Box Plots

6th Grade

Reading and creating box-and-whisker plots

Coordinate Plane

6th Grade

Plotting points ((x,y))

(x,y)

Dividing Fractions

6th Grade

Using reciprocals to divide fractions (÷, reciprocal)

÷, reciprocal

Double Number Lines

6th Grade

Visual representation for ratios and proportions

Expressions and Variables

6th Grade

Writing and evaluating algebraic expressions

GCF Applications

6th Grade

Using GCF to simplify fractions (GCF)

GCF

Histograms

6th Grade

Frequency distributions with intervals

Integers

6th Grade

Positive and negative numbers

Interquartile Range (IQR)

6th Grade

Understanding spread in data (Q3 - Q1)

Q3 - Q1

LCM Applications

6th Grade

Using LCM for adding fractions (LCM)

LCM

Median and Mode

6th Grade

Additional measures of center

Negative Numbers

6th Grade

Number line with negative values

One-Step Equations

6th Grade

Solving simple equations (x + a = b, ax = b)

x + a = b, ax = b

Operations with Integers

6th Grade

All four operations with positive and negative numbers (+, -, ×, ÷)

+, -, ×, ÷

Percent of a Number

6th Grade

Finding percentages of quantities (% × n)

% × n

Percentages

6th Grade

Per hundred relationships (% = part/whole × 100)

% = part/whole × 100

Rate and Unit Rate

6th Grade

Speed, cost per unit, unit conversion (rate = distance/time)

rate = distance/time

Ratio Tables

6th Grade

Equivalent ratios in table format (a:b)

a:b

Ratios and Proportions

6th Grade

Comparing quantities (a:b = c:d)

a:b = c:d

Statistical Questions

6th Grade

Analyzing data distributions (mean, median, mode, range)

mean, median, mode, range

Surface Area

6th Grade

Nets and surface area of prisms (SA = 2lw + 2lh + 2wh)

SA = 2lw + 2lh + 2wh

7th Grade 18 terms

Angles and Triangles

7th Grade

Triangle properties and angle relationships (Sum of angles = 180°)

Sum of angles = 180°

Area

7th Grade

2D measurement (A=lw, A=πr²)

A=lw, A=πr²

Circles

7th Grade

Circumference and area (C=2πr, A=πr²)

C=2πr, A=πr²

Combining Like Terms

7th Grade

Simplifying expressions by combining terms

Complementary and Supplementary Angles

7th Grade

Angle relationships and pairs (90°, 180°)

90°, 180°

Distributive Property

7th Grade

Expanding expressions using distribution (a(b + c) = ab + ac)

a(b + c) = ab + ac

Expressions and Equations

7th Grade

Using variables (y = mx + b)

y = mx + b

Inequalities

7th Grade

Comparing values (x > y)

x > y

Multi-Step Equations

7th Grade

Solving complex algebraic equations with multiple operations

Percent Applications

7th Grade

Tax, tip, discount, markup

Percent Change

7th Grade

Percent increase and decrease ((new - old)/old × 100%)

(new - old)/old × 100%

Probability Basics

7th Grade

Simple probability concepts (P(A) = favorable/total)

P(A) = favorable/total

Proportional Relationships

7th Grade

Direct proportion and constant of proportionality (y = kx)

y = kx

Sample Space

7th Grade

Listing all possible outcomes

Scale Drawings

7th Grade

Proportional reasoning (scale factor)

scale factor

Simple Interest

7th Grade

Principal, rate, time calculations (I = PRT)

I = PRT

Two-Step Equations

7th Grade

Solving multi-step equations (ax + b = c)

ax + b = c

Volume of Cylinders

7th Grade

Circular base volume calculations (V = πr²h)

V = πr²h

11th Grade (Algebra II) 14 terms

Arc Length and Sector Area

11th Grade (Algebra II)

Circle calculations with radians (s = rθ, A = (1/2)r²θ)

s = rθ, A = (1/2)r²θ

Complex Numbers

11th Grade (Algebra II)

Operations with imaginary unit i (a + bi)

a + bi

Conic Sections

11th Grade (Algebra II)

Equations of conic sections (parabola, ellipse, hyperbola)

parabola, ellipse, hyperbola

Exponential Functions

11th Grade (Algebra II)

Growth and decay (y=a·bˣ)

y=a·bˣ

Inverse Functions

11th Grade (Algebra II)

Finding and graphing inverses (f⁻¹(x))

f⁻¹(x)

Law of Cosines

11th Grade (Algebra II)

Non-right triangles (c²=a²+b²−2abcosC)

c²=a²+b²−2abcosC

Law of Sines

11th Grade (Algebra II)

Triangle relationships (a/sinA=b/sinB)

a/sinA=b/sinB

Logarithms

11th Grade (Algebra II)

Inverse of exponents (logₐx=y ↔ aʸ=x)

logₐx=y ↔ aʸ=x

Polynomial Division

11th Grade (Algebra II)

Long division and synthetic division

Rational Exponents

11th Grade (Algebra II)

Fractional exponents and radical form (x^(m/n) = ⁿ√(xᵐ))

x^(m/n) = ⁿ√(xᵐ)

Sequences (Arithmetic/Geometric)

11th Grade (Algebra II)

nth term and recursive formulas (aₙ = a₁ + (n-1)d, aₙ = a₁rⁿ⁻¹)

aₙ = a₁ + (n-1)d, aₙ = a₁rⁿ⁻¹

Series and Summation

11th Grade (Algebra II)

Arithmetic and geometric series (Σ, Sₙ)

Σ, Sₙ

Trig Identities

11th Grade (Algebra II)

Pythagorean and reciprocal identities (sin²θ + cos²θ = 1)

sin²θ + cos²θ = 1

Unit Circle

11th Grade (Algebra II)

Trigonometry on the unit circle (x² + y² = 1)

x² + y² = 1

12th Grade (Pre-Calculus/Calculus) 14 terms