First Grade addition and subtraction to 20

Front

What is the sum of 9 and 8?

Back

17

Front

What is 10 minus 5?

Back

5

Front

What is 18 minus 18?

Back

0

Front

What is the sum of 10 and 7?

Back

17

Front

What is 8 minus 6?

Back

2

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.

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 the sum.

Front

What is the identity property of addition?

Back

The identity property of addition states that adding zero to a number does not change the number.