3-Digit Addition Practice Worksheet - Add Three Numbers
Worksheet for adding three 3-digit numbers, featuring 25 addition problems with spaces for name, date, and score.
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Show Answer Key & Explanations
Step-by-step solution for: 25) adding 3 numbers, 3-digit addition Math Worksheets, Math ...
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Show Answer Key & Explanations
Step-by-step solution for: 25) adding 3 numbers, 3-digit addition Math Worksheets, Math ...
Let's solve each of the 3-digit addition problems step by step. We'll add three numbers in each column and show the work clearly.
---
```
513
613
+813
-----
```
Add:
- Units: 3 + 3 + 3 = 9
- Tens: 1 + 1 + 1 = 3
- Hundreds: 5 + 6 + 8 = 19
So, total = 1939
---
```
800
173
+449
-----
```
- Units: 0 + 3 + 9 = 12 → write 2, carry 1
- Tens: 0 + 7 + 4 + 1 (carry) = 12 → write 2, carry 1
- Hundreds: 8 + 1 + 4 + 1 (carry) = 14
Total = 1422
---
```
482
186
+863
-----
```
- Units: 2 + 6 + 3 = 11 → write 1, carry 1
- Tens: 8 + 8 + 6 + 1 = 23 → write 3, carry 2
- Hundreds: 4 + 1 + 8 + 2 = 15
Total = 1531
---
```
308
371
+219
-----
```
- Units: 8 + 1 + 9 = 18 → write 8, carry 1
- Tens: 0 + 7 + 1 + 1 = 9
- Hundreds: 3 + 3 + 2 = 8
Total = 898
---
```
686
656
+202
-----
```
- Units: 6 + 6 + 2 = 14 → write 4, carry 1
- Tens: 8 + 5 + 0 + 1 = 14 → write 4, carry 1
- Hundreds: 6 + 6 + 2 + 1 = 15
Total = 1544
---
```
227
281
+965
-----
```
- Units: 7 + 1 + 5 = 13 → write 3, carry 1
- Tens: 2 + 8 + 6 + 1 = 17 → write 7, carry 1
- Hundreds: 2 + 2 + 9 + 1 = 14
Total = 1473
---
```
472
554
+605
-----
```
- Units: 2 + 4 + 5 = 11 → write 1, carry 1
- Tens: 7 + 5 + 0 + 1 = 13 → write 3, carry 1
- Hundreds: 4 + 5 + 6 + 1 = 16
Total = 1631
---
```
552
870
+116
-----
```
- Units: 2 + 0 + 6 = 8
- Tens: 5 + 7 + 1 = 13 → write 3, carry 1
- Hundreds: 5 + 8 + 1 + 1 = 15
Total = 1538
---
```
813
836
+162
-----
```
- Units: 3 + 6 + 2 = 11 → write 1, carry 1
- Tens: 1 + 3 + 6 + 1 = 11 → write 1, carry 1
- Hundreds: 8 + 8 + 1 + 1 = 18
Total = 1811
---
```
157
205
+146
-----
```
- Units: 7 + 5 + 6 = 18 → write 8, carry 1
- Tens: 5 + 0 + 4 + 1 = 10 → write 0, carry 1
- Hundreds: 1 + 2 + 1 + 1 = 5
Total = 508
---
```
977
774
+749
-----
```
- Units: 7 + 4 + 9 = 20 → write 0, carry 2
- Tens: 7 + 7 + 4 + 2 = 20 → write 0, carry 2
- Hundreds: 9 + 7 + 7 + 2 = 25
Total = 2500
---
```
131
968
+685
-----
```
- Units: 1 + 8 + 5 = 14 → write 4, carry 1
- Tens: 3 + 6 + 8 + 1 = 18 → write 8, carry 1
- Hundreds: 1 + 9 + 6 + 1 = 17
Total = 1784
---
```
655
872
+977
-----
```
- Units: 5 + 2 + 7 = 14 → write 4, carry 1
- Tens: 5 + 7 + 7 + 1 = 20 → write 0, carry 2
- Hundreds: 6 + 8 + 9 + 2 = 25
Total = 2504
---
```
321
351
+411
-----
```
- Units: 1 + 1 + 1 = 3
- Tens: 2 + 5 + 1 = 8
- Hundreds: 3 + 3 + 4 = 10
Total = 1083
---
```
650
203
+406
-----
```
- Units: 0 + 3 + 6 = 9
- Tens: 5 + 0 + 0 = 5
- Hundreds: 6 + 2 + 4 = 12
Total = 1259
---
```
544
734
+145
-----
```
- Units: 4 + 4 + 5 = 13 → write 3, carry 1
- Tens: 4 + 3 + 4 + 1 = 12 → write 2, carry 1
- Hundreds: 5 + 7 + 1 + 1 = 14
Total = 1423
---
```
567
923
+987
-----
```
- Units: 7 + 3 + 7 = 17 → write 7, carry 1
- Tens: 6 + 2 + 8 + 1 = 17 → write 7, carry 1
- Hundreds: 5 + 9 + 9 + 1 = 24
Total = 2477
---
```
681
212
+574
-----
```
- Units: 1 + 2 + 4 = 7
- Tens: 8 + 1 + 7 = 16 → write 6, carry 1
- Hundreds: 6 + 2 + 5 + 1 = 14
Total = 1467
---
```
624
929
+461
-----
```
- Units: 4 + 9 + 1 = 14 → write 4, carry 1
- Tens: 2 + 2 + 6 + 1 = 11 → write 1, carry 1
- Hundreds: 6 + 9 + 4 + 1 = 20
Total = 2014
---
```
425
279
+840
-----
```
- Units: 5 + 9 + 0 = 14 → write 4, carry 1
- Tens: 2 + 7 + 4 + 1 = 14 → write 4, carry 1
- Hundreds: 4 + 2 + 8 + 1 = 15
Total = 1544
---
```
593
848
+495
-----
```
- Units: 3 + 8 + 5 = 16 → write 6, carry 1
- Tens: 9 + 4 + 9 + 1 = 23 → write 3, carry 2
- Hundreds: 5 + 8 + 4 + 2 = 19
Total = 1936
---
```
623
453
+305
-----
```
- Units: 3 + 3 + 5 = 11 → write 1, carry 1
- Tens: 2 + 5 + 0 + 1 = 8
- Hundreds: 6 + 4 + 3 = 13
Total = 1381
---
```
485
486
+217
-----
```
- Units: 5 + 6 + 7 = 18 → write 8, carry 1
- Tens: 8 + 8 + 1 + 1 = 18 → write 8, carry 1
- Hundreds: 4 + 4 + 2 + 1 = 11
Total = 1188
---
```
616
718
+395
-----
```
- Units: 6 + 8 + 5 = 19 → write 9, carry 1
- Tens: 1 + 1 + 9 + 1 = 12 → write 2, carry 1
- Hundreds: 6 + 7 + 3 + 1 = 17
Total = 1729
---
```
835
266
+786
-----
```
- Units: 5 + 6 + 6 = 17 → write 7, carry 1
- Tens: 3 + 6 + 8 + 1 = 18 → write 8, carry 1
- Hundreds: 8 + 2 + 7 + 1 = 18
Total = 1887
---
| Problem | Answer |
|--------|--------|
| 1 | 1939 |
| 2 | 1422 |
| 3 | 1531 |
| 4 | 898 |
| 5 | 1544 |
| 6 | 1473 |
| 7 | 1631 |
| 8 | 1538 |
| 9 | 1811 |
| 10 | 508 |
| 11 | 2500 |
| 12 | 1784 |
| 13 | 2504 |
| 14 | 1083 |
| 15 | 1259 |
| 16 | 1423 |
| 17 | 2477 |
| 18 | 1467 |
| 19 | 2014 |
| 20 | 1544 |
| 21 | 1936 |
| 22 | 1381 |
| 23 | 1188 |
| 24 | 1729 |
| 25 | 1887 |
You can now fill these answers into the worksheet!
Let me know if you'd like a printable version or explanation for any specific problem!
---
1.
```
513
613
+813
-----
```
Add:
- Units: 3 + 3 + 3 = 9
- Tens: 1 + 1 + 1 = 3
- Hundreds: 5 + 6 + 8 = 19
So, total = 1939
---
2.
```
800
173
+449
-----
```
- Units: 0 + 3 + 9 = 12 → write 2, carry 1
- Tens: 0 + 7 + 4 + 1 (carry) = 12 → write 2, carry 1
- Hundreds: 8 + 1 + 4 + 1 (carry) = 14
Total = 1422
---
3.
```
482
186
+863
-----
```
- Units: 2 + 6 + 3 = 11 → write 1, carry 1
- Tens: 8 + 8 + 6 + 1 = 23 → write 3, carry 2
- Hundreds: 4 + 1 + 8 + 2 = 15
Total = 1531
---
4.
```
308
371
+219
-----
```
- Units: 8 + 1 + 9 = 18 → write 8, carry 1
- Tens: 0 + 7 + 1 + 1 = 9
- Hundreds: 3 + 3 + 2 = 8
Total = 898
---
5.
```
686
656
+202
-----
```
- Units: 6 + 6 + 2 = 14 → write 4, carry 1
- Tens: 8 + 5 + 0 + 1 = 14 → write 4, carry 1
- Hundreds: 6 + 6 + 2 + 1 = 15
Total = 1544
---
6.
```
227
281
+965
-----
```
- Units: 7 + 1 + 5 = 13 → write 3, carry 1
- Tens: 2 + 8 + 6 + 1 = 17 → write 7, carry 1
- Hundreds: 2 + 2 + 9 + 1 = 14
Total = 1473
---
7.
```
472
554
+605
-----
```
- Units: 2 + 4 + 5 = 11 → write 1, carry 1
- Tens: 7 + 5 + 0 + 1 = 13 → write 3, carry 1
- Hundreds: 4 + 5 + 6 + 1 = 16
Total = 1631
---
8.
```
552
870
+116
-----
```
- Units: 2 + 0 + 6 = 8
- Tens: 5 + 7 + 1 = 13 → write 3, carry 1
- Hundreds: 5 + 8 + 1 + 1 = 15
Total = 1538
---
9.
```
813
836
+162
-----
```
- Units: 3 + 6 + 2 = 11 → write 1, carry 1
- Tens: 1 + 3 + 6 + 1 = 11 → write 1, carry 1
- Hundreds: 8 + 8 + 1 + 1 = 18
Total = 1811
---
10.
```
157
205
+146
-----
```
- Units: 7 + 5 + 6 = 18 → write 8, carry 1
- Tens: 5 + 0 + 4 + 1 = 10 → write 0, carry 1
- Hundreds: 1 + 2 + 1 + 1 = 5
Total = 508
---
11.
```
977
774
+749
-----
```
- Units: 7 + 4 + 9 = 20 → write 0, carry 2
- Tens: 7 + 7 + 4 + 2 = 20 → write 0, carry 2
- Hundreds: 9 + 7 + 7 + 2 = 25
Total = 2500
---
12.
```
131
968
+685
-----
```
- Units: 1 + 8 + 5 = 14 → write 4, carry 1
- Tens: 3 + 6 + 8 + 1 = 18 → write 8, carry 1
- Hundreds: 1 + 9 + 6 + 1 = 17
Total = 1784
---
13.
```
655
872
+977
-----
```
- Units: 5 + 2 + 7 = 14 → write 4, carry 1
- Tens: 5 + 7 + 7 + 1 = 20 → write 0, carry 2
- Hundreds: 6 + 8 + 9 + 2 = 25
Total = 2504
---
14.
```
321
351
+411
-----
```
- Units: 1 + 1 + 1 = 3
- Tens: 2 + 5 + 1 = 8
- Hundreds: 3 + 3 + 4 = 10
Total = 1083
---
15.
```
650
203
+406
-----
```
- Units: 0 + 3 + 6 = 9
- Tens: 5 + 0 + 0 = 5
- Hundreds: 6 + 2 + 4 = 12
Total = 1259
---
16.
```
544
734
+145
-----
```
- Units: 4 + 4 + 5 = 13 → write 3, carry 1
- Tens: 4 + 3 + 4 + 1 = 12 → write 2, carry 1
- Hundreds: 5 + 7 + 1 + 1 = 14
Total = 1423
---
17.
```
567
923
+987
-----
```
- Units: 7 + 3 + 7 = 17 → write 7, carry 1
- Tens: 6 + 2 + 8 + 1 = 17 → write 7, carry 1
- Hundreds: 5 + 9 + 9 + 1 = 24
Total = 2477
---
18.
```
681
212
+574
-----
```
- Units: 1 + 2 + 4 = 7
- Tens: 8 + 1 + 7 = 16 → write 6, carry 1
- Hundreds: 6 + 2 + 5 + 1 = 14
Total = 1467
---
19.
```
624
929
+461
-----
```
- Units: 4 + 9 + 1 = 14 → write 4, carry 1
- Tens: 2 + 2 + 6 + 1 = 11 → write 1, carry 1
- Hundreds: 6 + 9 + 4 + 1 = 20
Total = 2014
---
20.
```
425
279
+840
-----
```
- Units: 5 + 9 + 0 = 14 → write 4, carry 1
- Tens: 2 + 7 + 4 + 1 = 14 → write 4, carry 1
- Hundreds: 4 + 2 + 8 + 1 = 15
Total = 1544
---
21.
```
593
848
+495
-----
```
- Units: 3 + 8 + 5 = 16 → write 6, carry 1
- Tens: 9 + 4 + 9 + 1 = 23 → write 3, carry 2
- Hundreds: 5 + 8 + 4 + 2 = 19
Total = 1936
---
22.
```
623
453
+305
-----
```
- Units: 3 + 3 + 5 = 11 → write 1, carry 1
- Tens: 2 + 5 + 0 + 1 = 8
- Hundreds: 6 + 4 + 3 = 13
Total = 1381
---
23.
```
485
486
+217
-----
```
- Units: 5 + 6 + 7 = 18 → write 8, carry 1
- Tens: 8 + 8 + 1 + 1 = 18 → write 8, carry 1
- Hundreds: 4 + 4 + 2 + 1 = 11
Total = 1188
---
24.
```
616
718
+395
-----
```
- Units: 6 + 8 + 5 = 19 → write 9, carry 1
- Tens: 1 + 1 + 9 + 1 = 12 → write 2, carry 1
- Hundreds: 6 + 7 + 3 + 1 = 17
Total = 1729
---
25.
```
835
266
+786
-----
```
- Units: 5 + 6 + 6 = 17 → write 7, carry 1
- Tens: 3 + 6 + 8 + 1 = 18 → write 8, carry 1
- Hundreds: 8 + 2 + 7 + 1 = 18
Total = 1887
---
✔ Final Answers:
| Problem | Answer |
|--------|--------|
| 1 | 1939 |
| 2 | 1422 |
| 3 | 1531 |
| 4 | 898 |
| 5 | 1544 |
| 6 | 1473 |
| 7 | 1631 |
| 8 | 1538 |
| 9 | 1811 |
| 10 | 508 |
| 11 | 2500 |
| 12 | 1784 |
| 13 | 2504 |
| 14 | 1083 |
| 15 | 1259 |
| 16 | 1423 |
| 17 | 2477 |
| 18 | 1467 |
| 19 | 2014 |
| 20 | 1544 |
| 21 | 1936 |
| 22 | 1381 |
| 23 | 1188 |
| 24 | 1729 |
| 25 | 1887 |
You can now fill these answers into the worksheet!
Let me know if you'd like a printable version or explanation for any specific problem!
Parent Tip: Review the logic above to help your child master the concept of three number addition worksheet.
