Front

What is the sum of 9 and 9?

Back

18

Front

What is the sum of 7 and 7?

Back

14

Front

What is the sum of 4 and 4?

Back

8

Front

What is the sum of 10 and 10?

Back

20

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 states that changing the order of the numbers in an addition problem does not change the sum.

Front

What is the associative property of addition?

Back

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

Front

What is a double in mathematics?

Back

A double is the result of multiplying a number by 2.

Front

How do you represent addition in mathematical notation?

Back

Addition is represented by the plus sign (+).

Front

What is the identity property of addition?

Back

The identity property states that adding zero to any number does not change the value of that number.