1. Your teacher will tell you the NUMBER to write in the middle of the world. 2. Next, your teacher will tell you if your problem will be +, - or x. 3. Your teacher may provide a digital timer to time how long it takes you to race around the world. 3. Using the tool, write the answers to each problem on the outside of the donut. 4. Remember to record your time at the bottom of your worksheet. 5. Look at the example before you start. 6. Click on when you have finished.