Numbers 21 to 30

- The worksheet helps you learn inverse operations for additions.
- It contains numbers from 21 to 30.
- Calculate the value for missing numbers by ways of inverse addition for each of the problem.
- Write the solutions in the respective boxes.
- Confirm the numbers of correct answers by clicking the ‘Check’ button below.
- If your answers are right, you have done great.
- If any of your answer is wrong, do not worry. You can click on the box again, type your answer, and click the ‘Check’ button again.
- You can keep trying like this until you get all your answers correct.
- If you do not want to try again and just want to view the right answers, click the ‘Show Solution’ button.
- If you want to take the test once again, simply click the ‘Retry’ button.