Add Within 1000 — With Regrouping is a free printable Grade 3 maths worksheet on three-digit addition that carries, aligned to Common Core standard 3.NBT.A.2. It prints 12 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.
3.NBT.A.2
Work out each answer.
LessonPrint · 3.NBT.A.2 · Set 21 · free to copy for classroom use
Set 21. Prints on its own sheet.
Add and subtract within 1000 confidently.
Teaching this next? Fluent Addition and Subtraction to 1000 is the 45-minute plan for it, with the misconceptions to expect.
Last reviewed 2026-09-05. Aligned to 3.NBT.A.2 of the Common Core State Standards for mathematics.