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Printable three-digit addition worksheet with 20 problems for math practice.

A worksheet with 20 three-digit addition problems, designed for math practice, including spaces for name, teacher, score, and date at the top.

A worksheet with 20 three-digit addition problems, designed for math practice, including spaces for name, teacher, score, and date at the top.

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Show Answer Key & Explanations Step-by-step solution for: Math Worksheets | Dynamically Created Math Worksheets | Math ...
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Let’s solve each addition problem one by one. We’ll add the three numbers in each column carefully, making sure to carry over when needed.

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Row 1:

1. 449 + 679 + 244
→ 449 + 679 = 1128
→ 1128 + 244 = 1372

2. 166 + 891 + 463
→ 166 + 891 = 1057
→ 1057 + 463 = 1520

3. 937 + 918 + 212
→ 937 + 918 = 1855
→ 1855 + 212 = 2067

4. 736 + 826 + 992
→ 736 + 826 = 1562
→ 1562 + 992 = 2554

5. 828 + 412 + 157
→ 828 + 412 = 1240
→ 1240 + 157 = 1397

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Row 2:

6. 614 + 898 + 279
→ 614 + 898 = 1512
→ 1512 + 279 = 1791

7. 878 + 521 + 302
→ 878 + 521 = 1399
→ 1399 + 302 = 1701

8. 790 + 169 + 177
→ 790 + 169 = 959
→ 959 + 177 = 1136

9. 298 + 875 + 811
→ 298 + 875 = 1173
→ 1173 + 811 = 1984

10. 827 + 423 + 199
→ 827 + 423 = 1250
→ 1250 + 199 = 1449

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Row 3:

11. 802 + 268 + 627
→ 802 + 268 = 1070
→ 1070 + 627 = 1697

12. 272 + 845 + 153
→ 272 + 845 = 1117
→ 1117 + 153 = 1270

13. 613 + 122 + 332
→ 613 + 122 = 735
→ 735 + 332 = 1067

14. 886 + 380 + 854
→ 886 + 380 = 1266
→ 1266 + 854 = 2120

15. 118 + 591 + 716
→ 118 + 591 = 709
→ 709 + 716 = 1425

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Row 4:

16. 908 + 353 + 635
→ 908 + 353 = 1261
→ 1261 + 635 = 1896

17. 369 + 740 + 159
→ 369 + 740 = 1109
→ 1109 + 159 = 1268

18. 536 + 116 + 524
→ 536 + 116 = 652
→ 652 + 524 = 1176

19. 291 + 742 + 475
→ 291 + 742 = 1033
→ 1033 + 475 = 1508

20. 955 + 154 + 411
→ 955 + 154 = 1109
→ 1109 + 411 = 1520

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Final Answer:
1372, 1520, 2067, 2554, 1397, 1791, 1701, 1136, 1984, 1449, 1697, 1270, 1067, 2120, 1425, 1896, 1268, 1176, 1508, 1520
Parent Tip: Review the logic above to help your child master the concept of math worksheet for middle schoolers.
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