Topic 8 Vocabulary

Front

What is the Identity (Zero) Property of Addition?

Back

The sum of any number and zero is that number.

Front

What does the Commutative (Order) Property of Addition state?

Back

Numbers can be added in any order and the sums are the same.

Front

What does it mean to estimate a number?

Back

To give an approximate number.

Front

What is an Open Number Line?

Back

A number line that only displays the numbers being computed.

Front

What are Compatible Numbers?

Back

Numbers that are easy to add, subtract, multiply, or divide mentally.

Front

What is the Associative (Grouping) Property of Addition?

Back

The way numbers are grouped does not change the sum.

Front

What is the definition of Place Value?

Back

The value of a digit based on its position in a number.

Front

What is Mental Math?

Back

Performing calculations in your head without writing them down.

Front

What is the Inverse Operation?

Back

An operation that reverses the effect of another operation.

Front

What does it mean to round a number?

Back

To adjust a number to the nearest specified value.