Vocabulary

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Associative property of addition- states that addends can be regrouped and the remains the same

Commutative property of addition states that numbers can be added in any order and the sum remains the same. 

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Counting up from the lesser number to the greater number to find the difference of two numbers is known as counting on. 

Identity property of addition states the sum of any number and zero is that number. 

A symbol or letter that stands for a number is a variable.

Choosing numbers close to the numbers in a problem to make the computation easier, and then adjusting the answer for the numbers chosen is called compensation. 

operations that can undo each other are inverse operations. 

An algorithm is a set of steps used to solve a math problem.