Number Chains: Add and Take Away Within 20
A free printable number chains: add and take away within 20 worksheet with an answer key. Start with the colored number. Follow the arrows and write each new number in the next circle. Great for 1st grade practice at home or in class.
- Size
- US Letter (8.5 × 11 in), fits A4
- 2 pages: the worksheet and its answer key
- Level
- Grade 1
- License
- Free for personal & classroom use
About this worksheet
A free printable number chains: add and take away within 20 worksheet with an answer key. Start with the colored number. Follow the arrows and write each new number in the next circle. It matches first grade goals, roughly ages 6 to 7. Use small objects like buttons or cereal to check tricky problems.
On this sheet
6 problems, starting with 6 +2, 17 -3, 9 -4, 12 +1, 0 +2, 10 +2. The answers to all of them are on page 2.
Tips for using it
- Check each answer by adding it back to the number taken away.
- Count back on your fingers or the number line for the hardest facts.
- Have your child say each fact out loud while writing the answer.
- Point at each arrow as you go and say the step out loud: 'twelve, plus three, fifteen'.
Printing tips
Download the PDF and print at 100% (or “fit to page” on A4). Page 1 is the worksheet and page 2 is the answer key with the answers in red; print just page 1 if you want to keep the answers for checking. The PNG shows page 1 only. Free for personal, family and classroom use.
