Math worksheet for adding numbers up to 1000 without regrouping, featuring 15 addition problems.

Here are the solutions for the addition problems. I have added the numbers column by column (ones, then tens, then hundreds) to find the totals.

1. 187 + 510
* Ones: $7 + 0 = 7$
* Tens: $8 + 1 = 9$
* Hundreds: $1 + 5 = 6$
* Total: 697

2. 222 + 66
* Ones: $2 + 6 = 8$
* Tens: $2 + 6 = 8$
* Hundreds: $2 + 0 = 2$
* Total: 288

3. 690 + 208
* Ones: $0 + 8 = 8$
* Tens: $9 + 0 = 9$
* Hundreds: $6 + 2 = 8$
* Total: 898

4. 421 + 116
* Ones: $1 + 6 = 7$
* Tens: $2 + 1 = 3$
* Hundreds: $4 + 1 = 5$
* Total: 537

5. 326 + 642
* Ones: $6 + 2 = 8$
* Tens: $2 + 4 = 6$
* Hundreds: $3 + 6 = 9$
* Total: 968

6. 271 + 401
* Ones: $1 + 1 = 2$
* Tens: $7 + 0 = 7$
* Hundreds: $2 + 4 = 6$
* Total: 672

7. 343 + 120
* Ones: $3 + 0 = 3$
* Tens: $4 + 2 = 6$
* Hundreds: $3 + 1 = 4$
* Total: 463

8. 501 + 123
* Ones: $1 + 3 = 4$
* Tens: $0 + 2 = 2$
* Hundreds: $5 + 1 = 6$
* Total: 624

9. 205 + 503
* Ones: $5 + 3 = 8$
* Tens: $0 + 0 = 0$
* Hundreds: $2 + 5 = 7$
* Total: 708

10. 307 + 511
* Ones: $7 + 1 = 8$
* Tens: $0 + 1 = 1$
* Hundreds: $3 + 5 = 8$
* Total: 818

11. 111 + 532
* Ones: $1 + 2 = 3$
* Tens: $1 + 3 = 4$
* Hundreds: $1 + 5 = 6$
* Total: 643

12. 504 + 415
* Ones: $4 + 5 = 9$
* Tens: $0 + 1 = 1$
* Hundreds: $5 + 4 = 9$
* Total: 919

13. 640 + 142
* Ones: $0 + 2 = 2$
* Tens: $4 + 4 = 8$
* Hundreds: $6 + 1 = 7$
* Total: 782

14. 410 + 536
* Ones: $0 + 6 = 6$
* Tens: $1 + 3 = 4$
* Hundreds: $4 + 5 = 9$
* Total: 946

15. 213 + 250
* Ones: $3 + 0 = 3$
* Tens: $1 + 5 = 6$
* Hundreds: $2 + 2 = 4$
* Total: 463

Final Answer:
1. 697
2. 288
3. 898
4. 537
5. 968
6. 672
7. 463
8. 624
9. 708
10. 818
11. 643
12. 919
13. 782
14. 946
15. 463