Math Facts Within 20

Front

What is the sum of 8 and 8?

Back

16

Front

What is the sum of 9 and 9?

Back

18

Front

What is 12 minus 7?

Back

5

Front

What is 19 minus 12?

Back

7

Front

What is 32 minus 10?

Back

22

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 definition of subtraction?

Back

Subtraction is the mathematical operation of taking one number away from another.

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 the identity property of addition?

Back

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