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Adding Two and Three-Digit Numbers

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Adding Two and Three-Digit Numbers worksheet preview

Adding Two and Three-Digit Numbers

Place value blocks illustration

🔢 Part 1: Addition Practice

1. Solve these addition problems using the vertical method:

a) 234 + 45 = _______

b) 156 + 73 = _______

c) 382 + 29 = _______

d) 467 + 84 = _______

2. Circle the correct answer for each problem:

325 + 48 =

363

373

383

194 + 67 =

251

261

271

🧮 Part 2: Place Value Understanding

3. For the problem 456 + 78, fill in the blanks:

456 has _____ hundreds, _____ tens, and _____ ones

78 has _____ tens and _____ ones

When we add the ones: 6 + 8 = _____

Do we need to regroup? Circle: YES or NO

4. Show your working for 287 + 56:
5. Estimate first, then calculate:

a) 348 + 75

My estimate: _______ (round to nearest 10)

Exact answer: _______

b) 529 + 43

My estimate: _______ (round to nearest 10)

Exact answer: _______

🏪 Part 3: Real-World Problems

6. Sarah saved $245 in her piggy bank. Her grandmother gave her $67 more. How much money does Sarah have now?

Answer: Sarah has $_______ now.

7. A school collected 428 cans for recycling on Monday. On Tuesday, they collected 85 more cans. What is the total number of cans collected?

Answer: The school collected _______ cans in total.

8. Explain in your own words: Why do we line up the ones, tens, and hundreds columns when adding?

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