Evaluating Algebraic Expressions

Front

What is an algebraic expression?

Back

An algebraic expression is a combination of numbers, variables (like a, b, c), and operations (like +, -, ×, ÷).

Front

What does the letter 'a' represent in an expression?

Back

The letter 'a' is a variable that can stand for any number.

Front

What does the expression 3ab mean when a = 3 and b = 4?

Back

3ab means 3 times a times b. So, 3 × 3 × 4 = 36.

Front

How do you evaluate the expression 2a when a = 3?

Back

You replace 'a' with 3: 2a = 2 × 3 = 6.

Front

What is the value of (y + z)² when y = 5 and z = 2?

Back

First, add y and z: 5 + 2 = 7. Then square it: 7² = 49.

Front

What does the expression x² mean?

Back

x² means x multiplied by itself.

Front

How do you evaluate 2x + x² when x = 3?

Back

Replace x with 3: 2(3) + (3)² = 6 + 9 = 15.

Front

What is a variable in algebra?

Back

A variable is a letter that represents a number we don't know yet.

Front

What does the expression 3ab represent?

Back

3ab represents 3 times the value of a times the value of b.

Front

What is the first step to evaluate an expression?

Back

The first step is to replace the variables with their given values.