Workbook Detail
Addition Addition Three Digit — Set 52
426 + 243 = ___
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Answer: 669
- Operand1
- 426
- Operand2
- 243
- Operator
- +
590 + 409 = ___
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Answer: 999
- Operand1
- 590
- Operand2
- 409
- Operator
- +
511 + 368 = ___
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Answer: 879
- Operand1
- 511
- Operand2
- 368
- Operator
- +
510 + 327 = ___
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Answer: 837
- Operand1
- 510
- Operand2
- 327
- Operator
- +
420 + 453 = ___
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Answer: 873
- Operand1
- 420
- Operand2
- 453
- Operator
- +
821 + 100 = ___
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Answer: 921
- Operand1
- 821
- Operand2
- 100
- Operator
- +
252 + 525 = ___
Show answer
Answer: 777
- Operand1
- 252
- Operand2
- 525
- Operator
- +
154 + 305 = ___
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Answer: 459
- Operand1
- 154
- Operand2
- 305
- Operator
- +
131 + 463 = ___
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Answer: 594
- Operand1
- 131
- Operand2
- 463
- Operator
- +
546 + 423 = ___
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Answer: 969
- Operand1
- 546
- Operand2
- 423
- Operator
- +
411 + 126 = ___
Show answer
Answer: 537
- Operand1
- 411
- Operand2
- 126
- Operator
- +
164 + 624 = ___
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Answer: 788
- Operand1
- 164
- Operand2
- 624
- Operator
- +
153 + 516 = ___
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Answer: 669
- Operand1
- 153
- Operand2
- 516
- Operator
- +
102 + 497 = ___
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Answer: 599
- Operand1
- 102
- Operand2
- 497
- Operator
- +
345 + 502 = ___
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Answer: 847
- Operand1
- 345
- Operand2
- 502
- Operator
- +
137 + 262 = ___
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Answer: 399
- Operand1
- 137
- Operand2
- 262
- Operator
- +
310 + 161 = ___
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Answer: 471
- Operand1
- 310
- Operand2
- 161
- Operator
- +
377 + 210 = ___
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Answer: 587
- Operand1
- 377
- Operand2
- 210
- Operator
- +
640 + 308 = ___
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Answer: 948
- Operand1
- 640
- Operand2
- 308
- Operator
- +
351 + 235 = ___
Show answer
Answer: 586
- Operand1
- 351
- Operand2
- 235
- 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.