Grade 4 Three-Digit Addition Worksheets
Start with eight focused practice problems, then use the answer key below to check the worksheet.
Practice Worksheet
Grade 4 Three-Digit Addition Practice
Solve each problem. Show your work.
- 1.839 + 110 = _____
- 2.757 + 22 = _____
- 3.621 + 115 = _____
- 4.812 + 184 = _____
- 5.206 + 383 = _____
- 6.193 + 504 = _____
- 7.368 + 411 = _____
- 8.454 + 432 = _____
Show answer key
- Question 1: 949
- Question 2: 779
- Question 3: 736
- Question 4: 996
- Question 5: 589
- Question 6: 697
- Question 7: 779
- Question 8: 886
Next Steps
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About These Worksheets
Grade 4 students use three-digit addition as a stepping stone toward four-digit and decimal addition, applying the same regrouping logic to larger numbers.
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.