Evaluating Expressions - One Step

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (like +, -, *, /) that represents a value.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with given numbers.

Front

Evaluate the expression: x + 5 when x = 4.

Back

9

Front

Evaluate the expression: m - 10 when m = 16.

Back

6

Front

Evaluate the expression: y + 4 when y = 20.

Back

24

Front

Evaluate the expression: 15 + c when c = 20.

Back

35

Front

Evaluate the expression: 50 - b when b = 30.

Back

20

Front

What is a variable in an expression?

Back

A variable is a symbol (like x or y) that represents an unknown value.

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change, like 5 or 20.

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).