What are the propertys of addition?

Answer 1

Properties of Addition

Commutative : The commutative property in math comes from the words "move around." This rule states that you can move numbers or variables in algebra around and still get the same answer. This equation defines the commutative property of addition: a + b = b + a

Associative: To “associate” means to connect or join with something.

According to the associative property of addition, the sum of three or more numbers remains the same regardless of how the numbers are grouped.

Identify: Identity Property Of Addition :

The identity property of addition is that the sum of any number and its identity value gives the same number as the result. In addition, 0 is the identity element.

Distributive: The Distributive Property is easy to remember, if you recall that "multiplication distributes over addition". Formally, they write this property as "a(b + c) = ab + ac". In numbers, this means, for example, that 2(3 + 4) = 2×3 + 2×4. Any time they refer in a problem to using the Distributive Property, they want you to take something through the parentheses (or factor something out); any time a computation depends on multiplying through a parentheses (or factoring something out), they want you to say that the computation used the Distributive Property.

• Why is the following true? 2(x + y) = 2_x_ + 2_y_

Since they distributed through the parentheses, this is true by the Distributive Property.