The commutative property states that changing the order of numbers being added or multiplied does not change the result. For example, in addition, 4 + 2 is equal to 2 + 4.
Understanding number relationships helps students develop addition strategies like making a ten to add. It allows them to see connections between single-digit numbers and larger benchmark numbers like 5, 10, and 20.
To add three numbers efficiently, you can start by adding any two numbers first and then adding the third number to the sum. This strategy helps break down complex additions into simpler steps.