# How to find an unknown using a known fact

In this lesson we will In this lesson we will use a ratio chart with missing numbers and work out what numbers are missing. We are going to use the relationships and what we know about adjacent numbers and the facts in our two times table to work out the missing numbers.

# Video

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.

# Lesson summary: How to find an unknown using a known fact

The next lesson in The two times table is "Varied Practice Applying Knowledge of the Two Times Table"