+ 9 Math Facts

Front

What is the sum of 7 and 9?

Back

The sum of 7 and 9 is 16.

Front

What is the sum of 3 and 9?

Back

The sum of 3 and 9 is 12.

Front

What is the sum of 8 and 9?

Back

The sum of 8 and 9 is 17.

Front

What is the sum of 1 and 9?

Back

The sum of 1 and 9 is 10.

Front

What is the sum of 6 and 9?

Back

The sum of 6 and 9 is 15.

Front

What is the definition of addition?

Back

Addition is the mathematical operation of combining two or more numbers to get a total.

Front

What is the commutative property of addition?

Back

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

Front

What is the associative property of addition?

Back

The associative property of addition states that the way in which numbers are grouped in addition does not change the sum.

Front

What is a number line and how is it used in addition?

Back

A number line is a visual representation of numbers in a straight line, used to illustrate addition by showing the distance between numbers.

Front

How can you check your addition?

Back

You can check your addition by using the inverse operation, subtraction, to see if the sum minus one of the addends equals the other addend.