Workbook Detail
Addition Addition Three Digit — Set 25
251 + 502 = ___
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Answer: 753
- Operand1
- 251
- Operand2
- 502
- Operator
- +
234 + 144 = ___
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Answer: 378
- Operand1
- 234
- Operand2
- 144
- Operator
- +
462 + 213 = ___
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Answer: 675
- Operand1
- 462
- Operand2
- 213
- Operator
- +
145 + 314 = ___
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Answer: 459
- Operand1
- 145
- Operand2
- 314
- Operator
- +
621 + 221 = ___
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Answer: 842
- Operand1
- 621
- Operand2
- 221
- Operator
- +
111 + 406 = ___
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Answer: 517
- Operand1
- 111
- Operand2
- 406
- Operator
- +
617 + 111 = ___
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Answer: 728
- Operand1
- 617
- Operand2
- 111
- Operator
- +
414 + 364 = ___
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Answer: 778
- Operand1
- 414
- Operand2
- 364
- Operator
- +
417 + 420 = ___
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Answer: 837
- Operand1
- 417
- Operand2
- 420
- Operator
- +
303 + 140 = ___
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Answer: 443
- Operand1
- 303
- Operand2
- 140
- Operator
- +
710 + 289 = ___
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Answer: 999
- Operand1
- 710
- Operand2
- 289
- Operator
- +
462 + 434 = ___
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Answer: 896
- Operand1
- 462
- Operand2
- 434
- Operator
- +
216 + 113 = ___
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Answer: 329
- Operand1
- 216
- Operand2
- 113
- Operator
- +
321 + 432 = ___
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Answer: 753
- Operand1
- 321
- Operand2
- 432
- Operator
- +
228 + 671 = ___
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Answer: 899
- Operand1
- 228
- Operand2
- 671
- Operator
- +
421 + 111 = ___
Show answer
Answer: 532
- Operand1
- 421
- Operand2
- 111
- Operator
- +
330 + 566 = ___
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Answer: 896
- Operand1
- 330
- Operand2
- 566
- Operator
- +
200 + 566 = ___
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Answer: 766
- Operand1
- 200
- Operand2
- 566
- Operator
- +
104 + 401 = ___
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Answer: 505
- Operand1
- 104
- Operand2
- 401
- Operator
- +
600 + 316 = ___
Show answer
Answer: 916
- Operand1
- 600
- Operand2
- 316
- Operator
- +
Teaching Notes
Download this free addition three digit math worksheet. Uniquely generated with an answer key — great for homework, practice, or assessment.
Features
- Printable PDF format
- Answer key included
- Multiple difficulty levels
- Classroom and home friendly
How to Use These Worksheets
- Select a three digit set.
- Print or use on-screen.
- Check answers and practice again.
Tips
- Start with easier sets and move up gradually.
- Practice in short sessions (10–15 minutes).
- Review mistakes and redo similar problems.
Frequently Asked Questions
How do I use this Addition Three Digit Math Worksheet worksheet?
Print the worksheet and complete the problems. Each set number generates a unique arrangement. Use the same set number for all students in a class for consistent assessment.
Is there an answer key?
Yes — every worksheet includes a complete answer key. Print it separately or view it on screen.