Addition and Subtraction

Front

What is addition?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

Front

What is subtraction?

Back

Subtraction is the process of taking one number away from another.

Front

What is a sum?

Back

The sum is the result of adding two or more numbers together.

Front

What is a difference?

Back

The difference is the result of subtracting one number from another.

Front

What are addends?

Back

Addends are the numbers that are added together in an addition problem.

Front

What is a fact family?

Back

A fact family is a group of related addition and subtraction facts using the same numbers.

Front

What does it mean to count on?

Back

Counting on means starting from a number and adding more by counting up.

Front

What are doubles facts?

Back

Doubles facts are addition problems where the same number is added to itself, like 4 + 4.

Front

What is the commutative property of addition?

Back

The commutative property states that changing the order of addends does not change the sum.

Front

What is the identity property of addition?

Back

The identity property states that adding zero to a number does not change the number.