What's on this worksheet
Every pair that makes 20, written as missing number additions and subtractions. Each sheet comes with an answer key on a separate page.
Teaching tips
- Show how each bond to 20 comes from a bond to 10 by adding a ten.
- A bead string or two ten frames side by side help children see both parts.
How to use this worksheet maker
Press New worksheet for a fresh set of problems, then Print. To save a PDF instead, choose "Save as PDF" in the print window. Every sheet has a short code in the bottom corner. Copy the link to a sheet and you can print exactly the same problems again later, which is handy for retakes and for sharing with other teachers.
National Curriculum: Year 1: number bonds within 20. Year 2: recall and use addition and subtraction facts to 20 fluently.