Unit 2: Addition and Subtraction to 20

Front

What is addition?

Back

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

Front

What is subtraction?

Back

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

Front

What is the sum of 5 and 5?

Back

The sum of 5 and 5 is 10.

Front

What is the sum of 3 and 4?

Back

The sum of 3 and 4 is 7.

Front

What is the difference between 10 and 4?

Back

The difference between 10 and 4 is 6.

Front

What is the difference between 8 and 3?

Back

The difference between 8 and 3 is 5.

Front

What is the missing number in 5 + ? = 10?

Back

The missing number is 5.

Front

What is the missing number in 7 - ? = 4?

Back

The missing number is 3.

Front

If you have 6 apples and you eat 2, how many apples do you have left?

Back

You have 4 apples left.

Front

If you have 9 candies and you give away 3, how many candies do you have left?

Back

You have 6 candies left.