3rd Grade Unit 2 Vocabulary

Front

What are Counting (natural) Numbers?

Back

The set of positive numbers that begins at one and increases by increments of one each time (1, 2, 3, ...).

Front

What are Compatible Numbers?

Back

Numbers that are slightly adjusted to create groups of numbers that are easy to compute mentally.

Front

What is Rounding?

Back

A type of estimation with specific rules for determining the closest value.

Front

What is a Polygon?

Back

A closed figure with at least 3 sides.

Front

What is an Expression in mathematics?

Back

A mathematical phrase, with no equal sign or comparison symbol, that may contain numbers, unknowns, and/or operators.

Front

What is an Equation?

Back

A mathematical statement that shows the equality of two expressions, typically containing an equal sign.

Front

What is an Addend?

Back

A number that is added to another number in an addition operation.

Front

What is a Minuend?

Back

The number from which another number (the subtrahend) is to be subtracted.

Front

What is a Subtrahend?

Back

The number that is to be subtracted from another number (the minuend).

Front

What is the Sum?

Back

The result of adding two or more numbers together.