Evaluating Expressions Practice

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) 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: y + 18 for y = 23.

Back

41

Front

Evaluate the expression: 2d + n for d = 2 and n = 3.

Back

7

Front

Evaluate the expression: 30 + r² for r = 3.

Back

39

Front

Evaluate the expression: 4r + 2 for r = 4.

Back

18

Front

Evaluate the expression: p² for p = 4.

Back

16

Front

What is a variable in an expression?

Back

A variable is a symbol (usually a letter) that represents an unknown value in an expression.

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).

Front

What is the value of r² when r = 5?

Back

25