Addition and Subtraction within 20

Front

What is the result of adding two numbers together?

Back

The result of adding two numbers together is called the sum.

Front

What is the result of subtracting one number from another?

Back

The result of subtracting one number from another is called the difference.

Front

If 8 + ? = 16, what is the missing number?

Back

The missing number is 8.

Front

What is the sum of 9 and 7?

Back

The sum of 9 and 7 is 16.

Front

What is 1 + 2?

Back

1 + 2 equals 3.

Front

What is the sum of 14 and 14?

Back

The sum of 14 and 14 is 28.

Front

If 18 - ? = 16, what is the missing number?

Back

The missing number is 2.

Front

What is the maximum sum you can get when adding two numbers within 20?

Back

The maximum sum you can get when adding two numbers within 20 is 20 + 20 = 40.

Front

What is the minimum sum you can get when adding two numbers within 20?

Back

The minimum sum you can get when adding two numbers within 20 is 0 + 0 = 0.

Front

How do you check if your addition is correct?

Back

You can check if your addition is correct by reversing the operation and subtracting one of the addends from the sum.