Grade 2 Three-Digit Addition Worksheets
Start with eight focused practice problems, then use the answer key below to check the worksheet.
Practice Worksheet
Grade 2 Three-Digit Addition Practice
Solve each problem. Show your work.
- 1.25 + 70 = _____
- 2.24 + 42 = _____
- 3.11 + 34 = _____
- 4.30 + 61 = _____
- 5.33 + 34 = _____
- 6.6 + 23 = _____
- 7.20 + 36 = _____
- 8.49 + 44 = _____
Show answer key
- Question 1: 95
- Question 2: 66
- Question 3: 45
- Question 4: 91
- Question 5: 67
- Question 6: 29
- Question 7: 56
- Question 8: 93
Next Steps
Finished the worksheet? Get it checked in seconds
Snap a photo of your child's completed Grade 2 three-digit addition work and Gradulo checks every answer with step-by-step feedback.
Check my workNeed another worksheet?
Log in to generate more Grade 2 three-digit addition worksheets and keep practice going.
About These Worksheets
Grade 2 students are introduced to three-digit addition as an extension of their two-digit regrouping skills, usually with only one carry per problem.
Three-digit addition worksheets extend column addition to numbers in the hundreds, giving students practice adding across three place values at once. These problems mix regrouping and non-regrouping cases so students learn to size up a problem first, rather than assuming every question needs a carry.
Adding three-digit numbers is where the standard algorithm really starts to pay off — mental math and counting strategies become impractical once numbers reach into the hundreds, so students need a dependable written method. These worksheets also introduce students to sums that may require regrouping twice in a row (ones into tens, then tens into hundreds), which is a common stumbling block. Clear column formatting and space for carried digits help students keep their work organized and legible.
Skills Practised
- Adding three-digit numbers using the standard algorithm
- Regrouping across multiple place-value columns in a single problem
- Estimating three-digit sums to check for reasonableness
- Keeping columns aligned by place value in written work
- Solving addition problems with numbers up to 999
Parent Tip: Encourage your child to estimate first by rounding each number to the nearest hundred — if 347 + 256 is roughly 350 + 250 = 600, their exact answer should land close to that.