Workbook Detail
Addition Addition Three Digit — Set 3
Exercise 1
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Answer: 420
- Operand1
- 161
- Operand2
- 259
- Operator
- +
Exercise 2
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Answer: 1224
- Operand1
- 721
- Operand2
- 503
- Operator
- +
Exercise 3
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Answer: 1486
- Operand1
- 949
- Operand2
- 537
- Operator
- +
Exercise 4
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Answer: 1200
- Operand1
- 345
- Operand2
- 855
- Operator
- +
Exercise 5
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Answer: 1564
- Operand1
- 917
- Operand2
- 647
- Operator
- +
Exercise 6
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Answer: 1005
- Operand1
- 353
- Operand2
- 652
- Operator
- +
Exercise 7
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Answer: 1058
- Operand1
- 239
- Operand2
- 819
- Operator
- +
Exercise 8
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Answer: 891
- Operand1
- 566
- Operand2
- 325
- Operator
- +
Exercise 9
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Answer: 1462
- Operand1
- 865
- Operand2
- 597
- Operator
- +
Exercise 10
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Answer: 1790
- Operand1
- 795
- Operand2
- 995
- Operator
- +
Exercise 11
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Answer: 1034
- Operand1
- 671
- Operand2
- 363
- Operator
- +
Exercise 12
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Answer: 1786
- Operand1
- 848
- Operand2
- 938
- Operator
- +
Exercise 13
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Answer: 665
- Operand1
- 383
- Operand2
- 282
- Operator
- +
Exercise 14
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Answer: 1204
- Operand1
- 218
- Operand2
- 986
- Operator
- +
Exercise 15
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Answer: 560
- Operand1
- 409
- Operand2
- 151
- Operator
- +
Exercise 16
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Answer: 1094
- Operand1
- 806
- Operand2
- 288
- Operator
- +
Exercise 17
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Answer: 619
- Operand1
- 399
- Operand2
- 220
- Operator
- +
Exercise 18
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Answer: 719
- Operand1
- 388
- Operand2
- 331
- Operator
- +
Exercise 19
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Answer: 1398
- Operand1
- 641
- Operand2
- 757
- Operator
- +
Exercise 20
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Answer: 1344
- Operand1
- 449
- Operand2
- 895
- 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.