Let’s solve each 3-digit addition problem step by step. Since the worksheet says “No Regrouping,” that means in every column (ones, tens, hundreds), the digits add up to less than 10 — so we don’t need to carry over any numbers.
We’ll go row by row, left to right.
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Row 1:
1.
320 + 636
- Ones: 0 + 6 = 6
- Tens: 2 + 3 = 5
- Hundreds: 3 + 6 = 9
→
956
2.
133 + 125
- Ones: 3 + 5 = 8
- Tens: 3 + 2 = 5
- Hundreds: 1 + 1 = 2
→
258
3.
207 + 512
- Ones: 7 + 2 = 9
- Tens: 0 + 1 = 1
- Hundreds: 2 + 5 = 7
→
719
4.
363 + 124
- Ones: 3 + 4 = 7
- Tens: 6 + 2 = 8
- Hundreds: 3 + 1 = 4
→
487
---
Row 2:
5.
823 + 102
- Ones: 3 + 2 = 5
- Tens: 2 + 0 = 2
- Hundreds: 8 + 1 = 9
→
925
6.
527 + 231
- Ones: 7 + 1 = 8
- Tens: 2 + 3 = 5
- Hundreds: 5 + 2 = 7
→
758
7.
330 + 139
- Ones: 0 + 9 = 9
- Tens: 3 + 3 = 6
- Hundreds: 3 + 1 = 4
→
469
8.
437 + 252
- Ones: 7 + 2 = 9
- Tens: 3 + 5 = 8
- Hundreds: 4 + 2 = 6
→
689
---
Row 3:
9.
727 + 212
- Ones: 7 + 2 = 9
- Tens: 2 + 1 = 3
- Hundreds: 7 + 2 = 9
→
939
10.
649 + 120
- Ones: 9 + 0 = 9
- Tens: 4 + 2 = 6
- Hundreds: 6 + 1 = 7
→
769
11.
428 + 361
- Ones: 8 + 1 = 9
- Tens: 2 + 6 = 8
- Hundreds: 4 + 3 = 7
→
789
12.
569 + 230
- Ones: 9 + 0 = 9
- Tens: 6 + 3 = 9
- Hundreds: 5 + 2 = 7
→
799
---
Row 4:
13.
222 + 256
- Ones: 2 + 6 = 8
- Tens: 2 + 5 = 7
- Hundreds: 2 + 2 = 4
→
478
14.
273 + 312
- Ones: 3 + 2 = 5
- Tens: 7 + 1 = 8
- Hundreds: 2 + 3 = 5
→
585
15.
456 + 403
- Ones: 6 + 3 = 9
- Tens: 5 + 0 = 5
- Hundreds: 4 + 4 = 8
→
859
16.
891 + 106
- Ones: 1 + 6 = 7
- Tens: 9 + 0 = 9
- Hundreds: 8 + 1 = 9
→
997
---
All problems are solved correctly with no regrouping needed.
Final Answer:
956, 258, 719, 487, 925, 758, 469, 689, 939, 769, 789, 799, 478, 585, 859, 997
Parent Tip: Review the logic above to help your child master the concept of addition 3 digit numbers without regrouping worksheet.
