Finding one less than a given number
In this lesson, we will use a number grid and objects to find one less than a given number within 20.
Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:
- Click "Close Video"
- Click "Next" to view the activity
Your video will re-appear on the next page, and will stay paused in the right place.