Numerical and Algebraic Expressions

Front

What is a numerical expression?

Back

A numerical expression is a mathematical phrase that includes numbers and operations (like addition, subtraction, multiplication, and division) but does not include variables.

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that includes numbers, variables, and operations. For example, 3x + 5 is an algebraic expression.

Front

How do you calculate the perimeter of a rectangle?

Back

The perimeter of a rectangle can be calculated using the formula P = 2l + 2w, where l is the length and w is the width.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to find its value by substituting numbers for the variables and performing the operations.

Front

What is a term in an expression?

Back

A term is a single mathematical expression that can be a number, a variable, or a combination of both, separated by addition or subtraction.

Front

How many terms are in the expression 4x - 7y + 12?

Back

The expression 4x - 7y + 12 has 3 terms: 4x, -7y, and 12.

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What is the sum of a number cubed and ten, divided by three?

Back

The expression for this phrase is (n^3 + 10)/3.

Front

If the cost of a pizza is $10.99 and each topping costs $1.25, how do you express the total cost for 3 toppings?

Back

The total cost can be expressed as 10.99 + 3(1.25).

Front

What is the value of the expression 5(n - 2) + 9 when n = 2?

Back

When n = 2, the expression evaluates to 9.

Front

What is a variable in an algebraic expression?

Back

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