Chapter 4 Algebraic Techniques – Substituting Numbers into Algebraic Expressions

Vocabulary flashcards covering key terms from Skillsheet 4B on substituting numbers into algebraic expressions.

Variable

A symbol (such as x, y, or n) that represents a number whose value can change.

Substitution

The process of replacing variables in an algebraic expression with given numerical values.

Algebraic Expression

A combination of variables, numbers, and operation symbols without an equals sign, e.g., 3x + y - 8.

Evaluate

To calculate the numerical value of an algebraic expression after substitution.

Coefficient

The numerical factor multiplied by a variable, such as 7 in 7t.

Constant Term

A number in an expression that has no variable attached, e.g., the 12 in t + 12.

Parentheses (Brackets)

Symbols ( ) used to group parts of an expression and indicate which operations to perform first.

Order of Operations

The agreed-upon rules (PEMDAS/BODMAS) that determine the sequence in which calculations are performed.

Exponent (Power)

A small raised number indicating how many times the base is multiplied by itself, e.g., 5².

Square

Raising a number to the power of 2; multiplying the number by itself.

Cube

Raising a number to the power of 3; multiplying the number by itself twice more.

Square Root (Radical)

A value that, when squared, equals the given number, written with the √ symbol.