Workbook Detail
Addition Addition Three Digit — Set 18
219 + 210 = ___
Show answer
Answer: 429
- Operand1
- 219
- Operand2
- 210
- Operator
- +
173 + 405 = ___
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Answer: 578
- Operand1
- 173
- Operand2
- 405
- Operator
- +
406 + 410 = ___
Show answer
Answer: 816
- Operand1
- 406
- Operand2
- 410
- Operator
- +
331 + 455 = ___
Show answer
Answer: 786
- Operand1
- 331
- Operand2
- 455
- Operator
- +
555 + 301 = ___
Show answer
Answer: 856
- Operand1
- 555
- Operand2
- 301
- Operator
- +
600 + 385 = ___
Show answer
Answer: 985
- Operand1
- 600
- Operand2
- 385
- Operator
- +
635 + 124 = ___
Show answer
Answer: 759
- Operand1
- 635
- Operand2
- 124
- Operator
- +
165 + 831 = ___
Show answer
Answer: 996
- Operand1
- 165
- Operand2
- 831
- Operator
- +
500 + 284 = ___
Show answer
Answer: 784
- Operand1
- 500
- Operand2
- 284
- Operator
- +
412 + 541 = ___
Show answer
Answer: 953
- Operand1
- 412
- Operand2
- 541
- Operator
- +
510 + 158 = ___
Show answer
Answer: 668
- Operand1
- 510
- Operand2
- 158
- Operator
- +
435 + 130 = ___
Show answer
Answer: 565
- Operand1
- 435
- Operand2
- 130
- Operator
- +
725 + 144 = ___
Show answer
Answer: 869
- Operand1
- 725
- Operand2
- 144
- Operator
- +
354 + 403 = ___
Show answer
Answer: 757
- Operand1
- 354
- Operand2
- 403
- Operator
- +
116 + 270 = ___
Show answer
Answer: 386
- Operand1
- 116
- Operand2
- 270
- Operator
- +
362 + 126 = ___
Show answer
Answer: 488
- Operand1
- 362
- Operand2
- 126
- Operator
- +
631 + 324 = ___
Show answer
Answer: 955
- Operand1
- 631
- Operand2
- 324
- Operator
- +
207 + 762 = ___
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Answer: 969
- Operand1
- 207
- Operand2
- 762
- Operator
- +
274 + 702 = ___
Show answer
Answer: 976
- Operand1
- 274
- Operand2
- 702
- Operator
- +
141 + 836 = ___
Show answer
Answer: 977
- Operand1
- 141
- Operand2
- 836
- 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.