Mr. Stein 2nd grade math facts

Front

What is the sum of 9 and 9?

Back

The sum of 9 and 9 is 18.

Front

What number must be added to 2 to get 10?

Back

8 must be added to 2 to get 10.

Front

What is 1 plus 1?

Back

1 plus 1 equals 2.

Front

What number must be added to 4 to get 10?

Back

6 must be added to 4 to get 10.

Front

What is 15 minus 2?

Back

15 minus 2 equals 13.

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 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 their sum.

Front

What is a missing addend?

Back

A missing addend is a number that needs to be added to another number to reach a specific total.