Addition and Subtraction Within 20

Front

What is the sum of 0 and 0?

Back

0

Front

What is 11 plus 6?

Back

17

Front

What is 15 minus 5?

Back

10

Front

What is 17 minus 4?

Back

13

Front

What is 1 plus 3?

Back

4

Front

What is the definition of addition?

Back

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

Front

What is the definition of subtraction?

Back

Subtraction is the process of finding the difference between two numbers by taking one number away from another.

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 (e.g., a + b = b + a).

Front

What is the associative property of addition?

Back

The associative property of addition states that the way in which numbers are grouped does not change their sum (e.g., (a + b) + c = a + (b + c)).

Front

What is the identity property of addition?

Back

The identity property of addition states that the sum of any number and zero is that number (e.g., a + 0 = a).