MathsFreePrintable

Three-Digit Addition Subtraction

A free maths worksheet ready for your classroom. Open in Kuraplan to grab the print-ready PDF, customize it for your students, or generate a fresh version in seconds.

Three-Digit Addition Subtraction worksheet preview

Three-Digit Addition and Subtraction

Calculator and numbers illustration

📊 Part 1: Estimation and Mental Maths

1. Round each number to the nearest hundred to estimate the answer:

456 + 378

456 rounds to _______ and 378 rounds to _______

Estimated answer: _______

2. Estimate by rounding to the nearest ten:

642 - 289

642 rounds to _______ and 289 rounds to _______

Estimated answer: _______

3. Which estimation strategy would give you a more accurate answer?

Rounding to the nearest ten

Rounding to the nearest hundred

Both are equally accurate

✏️ Part 2: Vertical Column Method

4. Solve using the vertical column method. Show your regrouping:

347 + 285 = _______

5. Solve using the vertical column method. Show your borrowing:

523 - 167 = _______

6. Complete this addition problem. Circle where regrouping occurred:

468 + 394 = _______

7. Check your answer to question 6 by estimating:

468 + 394 ≈ _______ + _______ = _______

Is your exact answer reasonable? _______

🧠 Part 3: Problem Solving

8. A school fundraiser collected $456 on Monday and $378 on Tuesday. How much money did they collect altogether?

Calculation:

Answer: $__________

9. There were 724 students at a concert. If 289 students left at interval, how many students remained?

Calculation:

Answer: __________ students

10. Explain in your own words why we regroup when adding or subtract three-digit numbers:

About This Worksheet

Free in Kuraplan

Sign up free, grab the PDF, and customize it for your class.

Print-Ready

Formatted for standard paper. Clean layout, easy to read.

AI-Generated

Created with Kuraplan's AI, designed for real classroom use.

For Teachers & Parents

Use in classrooms, for homework, tutoring, or homeschool.

Need a custom version of this worksheet?

Kuraplan's AI generates custom worksheets in seconds — differentiated for every learner, aligned to your curriculum.

Generate Custom Worksheets — Free
No credit card Curriculum-aligned Under 60 seconds