algebra Vocabulary
JamWise Education TeamยทUpdated March 2026
The algebra strand is a core part of the K-8 math curriculum. It encompasses 11 vocabulary terms that students encounter as they progress from kindergarten through 8th grade. Each term builds on previous knowledge, creating a spiral of deepening understanding that prepares learners for increasingly complex concepts.
Understanding algebra vocabulary is essential for classroom discussions, assessments, and real-world application. Below you will find every term organized by grade level, so teachers and parents can quickly identify which words are appropriate for their students and explore definitions tailored to each developmental stage.
3rd Grade
(5 terms)
Equation
A math sentence with an equal sign showing that two sides have the same value. 5 + 3 = 8 is an equation.
Expression
A math phrase with numbers and operations but no equal sign. 4 + 7 and 3 x 5 are expressions.
Parentheses
Symbols ( ) used in math to show which operation to do first. In (3 + 2) x 4, you add first.
Pattern
A set of numbers or shapes that follows a rule and repeats or grows in a predictable way.
Unknown
A missing number in an equation that you need to figure out, often shown as a question mark or a letter.
4th Grade
(5 terms)Equation
A math sentence that shows two expressions are equal using the equal sign. In 4 x n = 28, both sides equal 28.
Expression
A mathematical phrase with numbers and operation signs but no equal sign. 3 x (5 + 2) is an expression.
Pattern
A sequence of numbers or shapes that follows a rule. The pattern 3, 6, 9, 12 follows the rule 'add 3.'
Sequence
An ordered list of numbers that follows a pattern or rule, like 2, 4, 6, 8, 10.
Variable
A letter or symbol that stands for a number you do not know yet. In n + 5 = 12, the variable n stands for 7.
5th Grade
(8 terms)
Corresponding terms
Terms that have the same position in two related number patterns. In the patterns 0,3,6,9 and 0,6,12,18, the terms 6 and 12 correspond.
Equation
A mathematical sentence showing that two expressions are equal, using an equal sign. Example: 3x + 2 = 14.
Evaluate
To find the value of a mathematical expression by performing all the operations. Evaluating 3 + 4 x 2 gives 11.
Expression
A combination of numbers, variables, and operation symbols that represents a mathematical relationship, without an equal sign.
Inequality
A math sentence that compares two values using symbols like less than, greater than, or not equal to. Example: 5 + 3 is greater than 6.
Numerical expression
A math phrase made up of numbers and operation symbols but no equal sign. Example: (8 + 2) x 5.
Pattern
A sequence of numbers that follows a rule. In 1, 5, 25, 125 the rule is 'multiply by 5.'
Variable
A letter or symbol that represents an unknown number or a number that can change. In 5 + n = 12, n is a variable.