Addition and Subtraction Within 20

Front

What is the sum of 60 and 10?

Back

70

Front

What is 12 plus 7?

Back

19

Front

What is 11 plus 6?

Back

17

Front

What is 16 minus 8?

Back

8

Front

What is 8 minus 6?

Back

2

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 addition 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.