Unit 5: Addition and Subtraction within 20 Review

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 taking one number away from another.

Front

What is the sum of 7 and 5?

Back

The sum of 7 and 5 is 12.

Front

What is the difference when you subtract 3 from 10?

Back

The difference is 7.

Front

If you have 10 apples and you buy 5 more, how many apples do you have in total?

Back

You have 15 apples in total.

Front

If you have 18 candies and you give away 9, how many candies do you have left?

Back

You have 9 candies left.

Front

What is 5 + 4?

Back

5 + 4 equals 9.

Front

What is 15 - 6?

Back

15 - 6 equals 9.

Front

If there are 12 students in a class and 3 more join, how many students are there now?

Back

There are 15 students now.

Front

What is 8 + 7?

Back

8 + 7 equals 15.