Workbook Detail
Addition Addition Three Digit — Set 42
340 + 259 = ___
Show answer
Answer: 599
- Operand1
- 340
- Operand2
- 259
- Operator
- +
155 + 332 = ___
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Answer: 487
- Operand1
- 155
- Operand2
- 332
- Operator
- +
870 + 107 = ___
Show answer
Answer: 977
- Operand1
- 870
- Operand2
- 107
- Operator
- +
652 + 233 = ___
Show answer
Answer: 885
- Operand1
- 652
- Operand2
- 233
- Operator
- +
214 + 103 = ___
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Answer: 317
- Operand1
- 214
- Operand2
- 103
- Operator
- +
112 + 203 = ___
Show answer
Answer: 315
- Operand1
- 112
- Operand2
- 203
- Operator
- +
510 + 178 = ___
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Answer: 688
- Operand1
- 510
- Operand2
- 178
- Operator
- +
254 + 744 = ___
Show answer
Answer: 998
- Operand1
- 254
- Operand2
- 744
- Operator
- +
643 + 224 = ___
Show answer
Answer: 867
- Operand1
- 643
- Operand2
- 224
- Operator
- +
300 + 328 = ___
Show answer
Answer: 628
- Operand1
- 300
- Operand2
- 328
- Operator
- +
642 + 300 = ___
Show answer
Answer: 942
- Operand1
- 642
- Operand2
- 300
- Operator
- +
646 + 242 = ___
Show answer
Answer: 888
- Operand1
- 646
- Operand2
- 242
- Operator
- +
354 + 510 = ___
Show answer
Answer: 864
- Operand1
- 354
- Operand2
- 510
- Operator
- +
320 + 527 = ___
Show answer
Answer: 847
- Operand1
- 320
- Operand2
- 527
- Operator
- +
302 + 124 = ___
Show answer
Answer: 426
- Operand1
- 302
- Operand2
- 124
- Operator
- +
132 + 704 = ___
Show answer
Answer: 836
- Operand1
- 132
- Operand2
- 704
- Operator
- +
135 + 842 = ___
Show answer
Answer: 977
- Operand1
- 135
- Operand2
- 842
- Operator
- +
520 + 159 = ___
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Answer: 679
- Operand1
- 520
- Operand2
- 159
- Operator
- +
563 + 215 = ___
Show answer
Answer: 778
- Operand1
- 563
- Operand2
- 215
- Operator
- +
243 + 201 = ___
Show answer
Answer: 444
- Operand1
- 243
- Operand2
- 201
- 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.