Understanding Operations and Expressions

Which of the following is NOT one of the four main mathematical operations?

• Division

• Exponentiation

• Subtraction

• Addition

What does a mathematical expression typically include?

• Only variables

• Numbers, operations, and variables

• Numbers and operations

• Only numbers

In the expression '3y', what operation is implied between 3 and y?

• Addition

• Subtraction

• Multiplication

• Division

What is the main goal of simplifying a mathematical expression?

• To change its value

• To make it longer

• To represent it in a shorter or more efficient way

• To add more variables

When simplifying the expression '2 + 5', what is the result?

• 7

• 5

• 2

• 10