Grade 3 Addition Worksheets
Grade 3 extends column addition to hundreds. The sheets move from no regrouping, to one carry, to carrying in both the ones and the tens, finishing with real-life word problems. Every sheet has 20 questions and an answer key.
What is on each sheet
- Easy: 3-digit addition, no regrouping. A confidence builder that practises the core skill on its own.
- Medium: 3-digit addition, regrouping once. One new step, so children stretch without getting stuck.
- Hard: 3-digit addition, regrouping twice, and word problems. The last four questions are short word problems that ask children to choose the sum themselves.
Each worksheet prints on one A4 page with space to work, followed by a separate answer key page. Print only the first page for the child and keep the key for checking.
Download the worksheets
Make a new sheet
Finished all three? Make a fresh worksheet with new numbers at the same level, then print it or save it as a PDF.
Worked example
How to use these sheets
- Start with the easy sheet and do not rush: accuracy first, speed comes later.
- Check with the answer key together and ask your child to redo any wrong answers, explaining each step out loud.
- Move up a level after 18 or more correct answers. If a level feels too hard, make a new sheet at the level below.
- Keep sessions short. Ten focused minutes a day builds fluency faster than one long session a week.
Frequently asked questions
How can my child check a 3-digit addition?
Estimate first by rounding each number to the nearest hundred. If 358 + 276 is about 400 + 300 = 700, an answer of 634 is sensible.
What if my child forgets to carry?
Ask them to write the carried 1 small above the next column every time. The habit removes most mistakes.
Practise on screen too with the Place Value Blocks.