3 Digit Addition Challenge Math Worksheet - Twisty Noodle - Free Printable

Let’s solve each addition problem step by step. I’ll go row by row, left to right.

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First row:

1. 123 + 470
- Add ones: 3 + 0 = 3
- Add tens: 2 + 7 = 9
- Add hundreds: 1 + 4 = 5
→ 593

2. 339 + 612
- Ones: 9 + 2 = 11 → write 1, carry 1
- Tens: 3 + 1 + 1 (carry) = 5
- Hundreds: 3 + 6 = 9
→ 951

3. 229 + 671
- Ones: 9 + 1 = 10 → write 0, carry 1
- Tens: 2 + 7 + 1 = 10 → write 0, carry 1
- Hundreds: 2 + 6 + 1 = 9
→ 900

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Second row:

4. 651 + 185
- Ones: 1 + 5 = 6
- Tens: 5 + 8 = 13 → write 3, carry 1
- Hundreds: 6 + 1 + 1 = 8
→ 836

5. 446 + 550
- Ones: 6 + 0 = 6
- Tens: 4 + 5 = 9
- Hundreds: 4 + 5 = 9
→ 996

6. 877 + 102
- Ones: 7 + 2 = 9
- Tens: 7 + 0 = 7
- Hundreds: 8 + 1 = 9
→ 979

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Third row:

7. 367 + 267
- Ones: 7 + 7 = 14 → write 4, carry 1
- Tens: 6 + 6 + 1 = 13 → write 3, carry 1
- Hundreds: 3 + 2 + 1 = 6
→ 634

8. 598 + 416
- Ones: 8 + 6 = 14 → write 4, carry 1
- Tens: 9 + 1 + 1 = 11 → write 1, carry 1
- Hundreds: 5 + 4 + 1 = 10 → write 10
→ 1014

9. 711 + 233
- Ones: 1 + 3 = 4
- Tens: 1 + 3 = 4
- Hundreds: 7 + 2 = 9
→ 944

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Fourth row:

10. 85 + 825
- Align properly:
```
85
+825
----
```
- Ones: 5 + 5 = 10 → write 0, carry 1
- Tens: 8 + 2 + 1 = 11 → write 1, carry 1
- Hundreds: 0 + 8 + 1 = 9
→ 910

11. 371 + 565
- Ones: 1 + 5 = 6
- Tens: 7 + 6 = 13 → write 3, carry 1
- Hundreds: 3 + 5 + 1 = 9
→ 936

12. 906 + 24
- Align:
```
906
+ 24
----
```
- Ones: 6 + 4 = 10 → write 0, carry 1
- Tens: 0 + 2 + 1 = 3
- Hundreds: 9 + 0 = 9
→ 930

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Final Answer:
593, 951, 900, 836, 996, 979, 634, 1014, 944, 910, 936, 930