What are the Identity Properties of Addition and Multiplication?

'a' is a variable that stands for anything. It could be a number, an expression, or any combination of numbers and expressions!
Adding or subtracting 0 from anything doesn't change the value!

1. Remember, an expression is any collection of numbers and variables that you can imagine!
1. Remember, an expression is any collection of numbers and variables that you can imagine!
1. Adding zero doesn't change the value of anything!
1. 'a' is a variable that stands for anything. It could be a number, an expression, or any combination of numbers and expressions!
1. Remember, zero is the identity of addition/subtraction!
1. Multiplying by 1 doesn't change the value of anything!
1. 'a' is a variable that stands for anything. It could be a number, an expression, or any combination of numbers and expressions!

Definition: Identities of Addition/Subtraction and Multiplication/Division