Workbook Detail
Addition Addition Three Digit — Set 17
343 + 512 = ___
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Answer: 855
- Operand1
- 343
- Operand2
- 512
- Operator
- +
334 + 344 = ___
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Answer: 678
- Operand1
- 334
- Operand2
- 344
- Operator
- +
464 + 521 = ___
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Answer: 985
- Operand1
- 464
- Operand2
- 521
- Operator
- +
241 + 532 = ___
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Answer: 773
- Operand1
- 241
- Operand2
- 532
- Operator
- +
404 + 410 = ___
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Answer: 814
- Operand1
- 404
- Operand2
- 410
- Operator
- +
631 + 143 = ___
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Answer: 774
- Operand1
- 631
- Operand2
- 143
- Operator
- +
142 + 617 = ___
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Answer: 759
- Operand1
- 142
- Operand2
- 617
- Operator
- +
240 + 449 = ___
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Answer: 689
- Operand1
- 240
- Operand2
- 449
- Operator
- +
192 + 706 = ___
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Answer: 898
- Operand1
- 192
- Operand2
- 706
- Operator
- +
227 + 350 = ___
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Answer: 577
- Operand1
- 227
- Operand2
- 350
- Operator
- +
201 + 374 = ___
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Answer: 575
- Operand1
- 201
- Operand2
- 374
- Operator
- +
226 + 751 = ___
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Answer: 977
- Operand1
- 226
- Operand2
- 751
- Operator
- +
527 + 362 = ___
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Answer: 889
- Operand1
- 527
- Operand2
- 362
- Operator
- +
142 + 400 = ___
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Answer: 542
- Operand1
- 142
- Operand2
- 400
- Operator
- +
829 + 140 = ___
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Answer: 969
- Operand1
- 829
- Operand2
- 140
- Operator
- +
702 + 143 = ___
Show answer
Answer: 845
- Operand1
- 702
- Operand2
- 143
- Operator
- +
101 + 568 = ___
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Answer: 669
- Operand1
- 101
- Operand2
- 568
- Operator
- +
411 + 185 = ___
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Answer: 596
- Operand1
- 411
- Operand2
- 185
- Operator
- +
605 + 242 = ___
Show answer
Answer: 847
- Operand1
- 605
- Operand2
- 242
- Operator
- +
470 + 404 = ___
Show answer
Answer: 874
- Operand1
- 470
- Operand2
- 404
- 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.