Add two 1-digit numbers - sum 20 or less
This worksheet will be available soon
Printable PDF · No ads
Trial members get new resources first via email.
Free printable Add two 1-digit numbers - sum 20 or less worksheets for 1st grade. Students add pairs of single-digit numbers with sums up to 20, extending fact fluency into the teen range. Supports the complete 1st grade addition standard within 20. Part of our addition worksheets collection.
What You'll Learn
- Add two one-digit numbers with sums up to 20
- Practice addition facts that cross the ten boundary
- Build fluency with single-digit addition within 20
FAQ
What is the target fluency level for adding two single-digit numbers with sums to 20 in 1st grade?⌄
By the end of 1st grade, CCSS expects students to add and subtract within 20 using mental strategies, with automatic recall of sums to 10.
Which single-digit addition facts with sums to 20 are the hardest to memorize?⌄
Facts like 7+8, 6+9, and 8+7 are among the most challenging because they require bridging ten — strategies like 'make a ten' are especially useful here.
How do sums-to-20 worksheets build on earlier sums-to-10 work?⌄
The teen sums extend the same strategies — count on, make ten, use doubles — into a slightly larger range, creating a coherent progression of fact fluency.
Ratings & Reviews
3David L.
2nd Grade Teacher · Verified download
Looking forward to this! All the other ClassWeekly worksheets are excellent so I know this will be too.
Helpful · 8
Jamie T.
1st Grade Teacher · Verified download
Thanks for creating this! I'll be using it the moment it's available.
Helpful · 4
Emily W.
Homeschool parent · Verified download
Excited for this one! I've been hunting for a good printable on this topic for weeks.
Helpful · 9
What is ClassWeekly?
ClassWeekly offers free worksheets and printable learning resources for kids in preschool to grade 5. All worksheets are aligned to Common Core standards and designed by educators. Become a member to access the full library and download unlimited PDFs.
