3 Digit Addition Worksheets - Free Printable
Educational worksheet: 3 Digit Addition Worksheets. Download and print for classroom or home learning activities.
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Show Answer Key & Explanations
Step-by-step solution for: 3 Digit Addition Worksheets
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Show Answer Key & Explanations
Step-by-step solution for: 3 Digit Addition Worksheets
Let's solve each of the 3-digit addition problems with multiple addends step by step. We'll add the numbers column by column, starting from the right (ones place), carrying over when necessary.
---
```
165
+ 54
+ 223
------
```
- Ones: 5 + 4 + 3 = 12 → write 2, carry 1
- Tens: 6 + 5 + 2 + 1 (carry) = 14 → write 4, carry 1
- Hundreds: 1 + 0 + 2 + 1 (carry) = 4
Answer: 442
---
```
406
+ 153
+ 325
------
```
- Ones: 6 + 3 + 5 = 14 → write 4, carry 1
- Tens: 0 + 5 + 2 + 1 = 8
- Hundreds: 4 + 1 + 3 = 8
Answer: 884
---
```
276
+ 134
+ 65
------
```
- Ones: 6 + 4 + 5 = 15 → write 5, carry 1
- Tens: 7 + 3 + 6 + 1 = 17 → write 7, carry 1
- Hundreds: 2 + 1 + 0 + 1 = 4
Answer: 475
---
```
424
+ 336
+ 151
------
```
- Ones: 4 + 6 + 1 = 11 → write 1, carry 1
- Tens: 2 + 3 + 5 + 1 = 11 → write 1, carry 1
- Hundreds: 4 + 3 + 1 + 1 = 9
Answer: 911
---
```
243
+ 228
+ 76
------
```
- Ones: 3 + 8 + 6 = 17 → write 7, carry 1
- Tens: 4 + 2 + 7 + 1 = 14 → write 4, carry 1
- Hundreds: 2 + 2 + 0 + 1 = 5
Answer: 547
---
```
382
+ 156
+ 227
------
```
- Ones: 2 + 6 + 7 = 15 → write 5, carry 1
- Tens: 8 + 5 + 2 + 1 = 16 → write 6, carry 1
- Hundreds: 3 + 1 + 2 + 1 = 7
Answer: 765
---
```
513
+ 243
+ 165
------
```
- Ones: 3 + 3 + 5 = 11 → write 1, carry 1
- Tens: 1 + 4 + 6 + 1 = 12 → write 2, carry 1
- Hundreds: 5 + 2 + 1 + 1 = 9
Answer: 921
---
```
343
+ 256
+ 308
------
```
- Ones: 3 + 6 + 8 = 17 → write 7, carry 1
- Tens: 4 + 5 + 0 + 1 = 10 → write 0, carry 1
- Hundreds: 3 + 2 + 3 + 1 = 9
Answer: 907
---
```
527
+ 65
+ 336
------
```
- Ones: 7 + 5 + 6 = 18 → write 8, carry 1
- Tens: 2 + 6 + 3 + 1 = 12 → write 2, carry 1
- Hundreds: 5 + 0 + 3 + 1 = 9
Answer: 928
---
```
342
+ 128
+ 86
------
```
- Ones: 2 + 8 + 6 = 16 → write 6, carry 1
- Tens: 4 + 2 + 8 + 1 = 15 → write 5, carry 1
- Hundreds: 3 + 1 + 0 + 1 = 5
Answer: 556
---
```
287
+ 156
+ 224
------
```
- Ones: 7 + 6 + 4 = 17 → write 7, carry 1
- Tens: 8 + 5 + 2 + 1 = 16 → write 6, carry 1
- Hundreds: 2 + 1 + 2 + 1 = 6
Answer: 667
---
```
329
+ 308
+ 175
------
```
- Ones: 9 + 8 + 5 = 22 → write 2, carry 2
- Tens: 2 + 0 + 7 + 2 = 11 → write 1, carry 1
- Hundreds: 3 + 3 + 1 + 1 = 8
Answer: 812
---
```
336
+ 151
+ 270
------
```
- Ones: 6 + 1 + 0 = 7
- Tens: 3 + 5 + 7 = 15 → write 5, carry 1
- Hundreds: 3 + 1 + 2 + 1 = 7
Answer: 757
---
```
563
+ 37
+ 239
------
```
- Ones: 3 + 7 + 9 = 19 → write 9, carry 1
- Tens: 6 + 3 + 3 + 1 = 13 → write 3, carry 1
- Hundreds: 5 + 0 + 2 + 1 = 8
Answer: 839
---
```
228
+ 360
+ 96
------
```
- Ones: 8 + 0 + 6 = 14 → write 4, carry 1
- Tens: 2 + 6 + 9 + 1 = 18 → write 8, carry 1
- Hundreds: 2 + 3 + 0 + 1 = 6
Answer: 684
---
```
549
+ 63
+ 37
------
```
- Ones: 9 + 3 + 7 = 19 → write 9, carry 1
- Tens: 4 + 6 + 3 + 1 = 14 → write 4, carry 1
- Hundreds: 5 + 0 + 0 + 1 = 6
Answer: 649
---
```
420
+ 217
+ 348
------
```
- Ones: 0 + 7 + 8 = 15 → write 5, carry 1
- Tens: 2 + 1 + 4 + 1 = 8
- Hundreds: 4 + 2 + 3 = 9
Answer: 985
---
```
155
+ 128
+ 137
------
```
- Ones: 5 + 8 + 7 = 20 → write 0, carry 2
- Tens: 5 + 2 + 3 + 2 = 12 → write 2, carry 1
- Hundreds: 1 + 1 + 1 + 1 = 4
Answer: 420
---
```
497
+ 65
+ 284
------
```
- Ones: 7 + 5 + 4 = 16 → write 6, carry 1
- Tens: 9 + 6 + 8 + 1 = 24 → write 4, carry 2
- Hundreds: 4 + 0 + 2 + 2 = 8
Answer: 846
---
```
337
+ 366
+ 245
------
```
- Ones: 7 + 6 + 5 = 18 → write 8, carry 1
- Tens: 3 + 6 + 4 + 1 = 14 → write 4, carry 1
- Hundreds: 3 + 3 + 2 + 1 = 9
Answer: 948
---
| Problem | Answer |
|--------|--------|
| 1) | 442 |
| 2) | 884 |
| 3) | 475 |
| 4) | 911 |
| 5) | 547 |
| 6) | 765 |
| 7) | 921 |
| 8) | 907 |
| 9) | 928 |
| 10) | 556 |
| 11) | 667 |
| 12) | 812 |
| 13) | 757 |
| 14) | 839 |
| 15) | 684 |
| 16) | 649 |
| 17) | 985 |
| 18) | 420 |
| 19) | 846 |
| 20) | 948 |
Let me know if you'd like this in a printable format or need explanations for specific problems!
---
1)
```
165
+ 54
+ 223
------
```
- Ones: 5 + 4 + 3 = 12 → write 2, carry 1
- Tens: 6 + 5 + 2 + 1 (carry) = 14 → write 4, carry 1
- Hundreds: 1 + 0 + 2 + 1 (carry) = 4
Answer: 442
---
2)
```
406
+ 153
+ 325
------
```
- Ones: 6 + 3 + 5 = 14 → write 4, carry 1
- Tens: 0 + 5 + 2 + 1 = 8
- Hundreds: 4 + 1 + 3 = 8
Answer: 884
---
3)
```
276
+ 134
+ 65
------
```
- Ones: 6 + 4 + 5 = 15 → write 5, carry 1
- Tens: 7 + 3 + 6 + 1 = 17 → write 7, carry 1
- Hundreds: 2 + 1 + 0 + 1 = 4
Answer: 475
---
4)
```
424
+ 336
+ 151
------
```
- Ones: 4 + 6 + 1 = 11 → write 1, carry 1
- Tens: 2 + 3 + 5 + 1 = 11 → write 1, carry 1
- Hundreds: 4 + 3 + 1 + 1 = 9
Answer: 911
---
5)
```
243
+ 228
+ 76
------
```
- Ones: 3 + 8 + 6 = 17 → write 7, carry 1
- Tens: 4 + 2 + 7 + 1 = 14 → write 4, carry 1
- Hundreds: 2 + 2 + 0 + 1 = 5
Answer: 547
---
6)
```
382
+ 156
+ 227
------
```
- Ones: 2 + 6 + 7 = 15 → write 5, carry 1
- Tens: 8 + 5 + 2 + 1 = 16 → write 6, carry 1
- Hundreds: 3 + 1 + 2 + 1 = 7
Answer: 765
---
7)
```
513
+ 243
+ 165
------
```
- Ones: 3 + 3 + 5 = 11 → write 1, carry 1
- Tens: 1 + 4 + 6 + 1 = 12 → write 2, carry 1
- Hundreds: 5 + 2 + 1 + 1 = 9
Answer: 921
---
8)
```
343
+ 256
+ 308
------
```
- Ones: 3 + 6 + 8 = 17 → write 7, carry 1
- Tens: 4 + 5 + 0 + 1 = 10 → write 0, carry 1
- Hundreds: 3 + 2 + 3 + 1 = 9
Answer: 907
---
9)
```
527
+ 65
+ 336
------
```
- Ones: 7 + 5 + 6 = 18 → write 8, carry 1
- Tens: 2 + 6 + 3 + 1 = 12 → write 2, carry 1
- Hundreds: 5 + 0 + 3 + 1 = 9
Answer: 928
---
10)
```
342
+ 128
+ 86
------
```
- Ones: 2 + 8 + 6 = 16 → write 6, carry 1
- Tens: 4 + 2 + 8 + 1 = 15 → write 5, carry 1
- Hundreds: 3 + 1 + 0 + 1 = 5
Answer: 556
---
11)
```
287
+ 156
+ 224
------
```
- Ones: 7 + 6 + 4 = 17 → write 7, carry 1
- Tens: 8 + 5 + 2 + 1 = 16 → write 6, carry 1
- Hundreds: 2 + 1 + 2 + 1 = 6
Answer: 667
---
12)
```
329
+ 308
+ 175
------
```
- Ones: 9 + 8 + 5 = 22 → write 2, carry 2
- Tens: 2 + 0 + 7 + 2 = 11 → write 1, carry 1
- Hundreds: 3 + 3 + 1 + 1 = 8
Answer: 812
---
13)
```
336
+ 151
+ 270
------
```
- Ones: 6 + 1 + 0 = 7
- Tens: 3 + 5 + 7 = 15 → write 5, carry 1
- Hundreds: 3 + 1 + 2 + 1 = 7
Answer: 757
---
14)
```
563
+ 37
+ 239
------
```
- Ones: 3 + 7 + 9 = 19 → write 9, carry 1
- Tens: 6 + 3 + 3 + 1 = 13 → write 3, carry 1
- Hundreds: 5 + 0 + 2 + 1 = 8
Answer: 839
---
15)
```
228
+ 360
+ 96
------
```
- Ones: 8 + 0 + 6 = 14 → write 4, carry 1
- Tens: 2 + 6 + 9 + 1 = 18 → write 8, carry 1
- Hundreds: 2 + 3 + 0 + 1 = 6
Answer: 684
---
16)
```
549
+ 63
+ 37
------
```
- Ones: 9 + 3 + 7 = 19 → write 9, carry 1
- Tens: 4 + 6 + 3 + 1 = 14 → write 4, carry 1
- Hundreds: 5 + 0 + 0 + 1 = 6
Answer: 649
---
17)
```
420
+ 217
+ 348
------
```
- Ones: 0 + 7 + 8 = 15 → write 5, carry 1
- Tens: 2 + 1 + 4 + 1 = 8
- Hundreds: 4 + 2 + 3 = 9
Answer: 985
---
18)
```
155
+ 128
+ 137
------
```
- Ones: 5 + 8 + 7 = 20 → write 0, carry 2
- Tens: 5 + 2 + 3 + 2 = 12 → write 2, carry 1
- Hundreds: 1 + 1 + 1 + 1 = 4
Answer: 420
---
19)
```
497
+ 65
+ 284
------
```
- Ones: 7 + 5 + 4 = 16 → write 6, carry 1
- Tens: 9 + 6 + 8 + 1 = 24 → write 4, carry 2
- Hundreds: 4 + 0 + 2 + 2 = 8
Answer: 846
---
20)
```
337
+ 366
+ 245
------
```
- Ones: 7 + 6 + 5 = 18 → write 8, carry 1
- Tens: 3 + 6 + 4 + 1 = 14 → write 4, carry 1
- Hundreds: 3 + 3 + 2 + 1 = 9
Answer: 948
---
✔ Final Answers:
| Problem | Answer |
|--------|--------|
| 1) | 442 |
| 2) | 884 |
| 3) | 475 |
| 4) | 911 |
| 5) | 547 |
| 6) | 765 |
| 7) | 921 |
| 8) | 907 |
| 9) | 928 |
| 10) | 556 |
| 11) | 667 |
| 12) | 812 |
| 13) | 757 |
| 14) | 839 |
| 15) | 684 |
| 16) | 649 |
| 17) | 985 |
| 18) | 420 |
| 19) | 846 |
| 20) | 948 |
Let me know if you'd like this in a printable format or need explanations for specific problems!
Parent Tip: Review the logic above to help your child master the concept of 3 row addition worksheet.
