Expressions Review

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 variables with numbers and performing the operations.

Front

What is the perimeter of a rectangle?

Back

The perimeter of a rectangle is the total distance around it, calculated by adding the lengths of all four sides.

Front

How do you find the least common multiple (LCM) of two numbers?

Back

The LCM of two numbers is the smallest number that is a multiple of both. It can be found by listing the multiples or using prime factorization.

Front

What are like terms in an expression?

Back

Like terms are terms that have the same variable raised to the same power. For example, 3x and 5x are like terms.

Front

What is the value of x^2 - 2x when x = 4?

Back

When x = 4, the value of x^2 - 2x is 8.

Front

If n represents the number of brownies Allison made, how many did Aiden make if he made 10 fewer?

Back

Aiden made n - 10 brownies.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign and represents a value, while an equation states that two expressions are equal.

Front

What is the formula for the perimeter of a rectangle?

Back

The formula for the perimeter (P) of a rectangle is P = 2(length + width).

Front

What does it mean for terms to be 'like terms'?

Back

Like terms are terms that contain the same variable(s) raised to the same power, allowing them to be combined.