About Our Addition Worksheets
Our free printable addition worksheets start with the basics and build up. Easy worksheets focus on single-digit addition facts (sums to 10) — the foundational skills kindergarteners and 1st graders need. Medium worksheets introduce 2-digit addition, including problems with and without regrouping (carrying). Hard worksheets feature 3-digit addition for students ready for more challenging computation.
Each worksheet includes a separate answer key so students can check their own work. Problems are formatted in clean vertical columns with plenty of workspace. All worksheets print on standard US Letter paper. Generate a fresh set of randomized problems every time you click download.
Frequently Asked Questions
When should kids start practicing addition worksheets?
Most children can begin basic addition (sums to 5, then sums to 10) in kindergarten, around age 5-6. Start with manipulatives and number lines alongside worksheets. By 1st grade, students should be working toward fluency with single-digit addition facts. 2-digit addition with regrouping is typically introduced in 2nd grade.
What is 2-digit addition without regrouping?
Addition without regrouping means no carrying is needed — the sum of digits in each column stays under 10. For example, 23 + 14 = 37 (no carrying). Addition with regrouping requires carrying, like 27 + 15 = 42. Our medium worksheets include both types to build comfort with the carrying process.
How many addition facts should a student know by grade?
By end of kindergarten: sums to 5. By end of 1st grade: sums to 10 fluently. By end of 2nd grade: sums to 20 fluently, including 2-digit addition. By end of 3rd grade: multi-digit addition. These are general Common Core benchmarks — every student progresses at their own pace.