Let’s solve each addition problem one by one. Remember, we’re adding without regrouping — that means in each column (ones, tens, hundreds), the digits add up to 9 or less, so no carrying over is needed.
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First row:
1.
241 + 324
- Ones: 1 + 4 = 5
- Tens: 4 + 2 = 6
- Hundreds: 2 + 3 = 5
→ Answer:
565
2.
124 + 632
- Ones: 4 + 2 = 6
- Tens: 2 + 3 = 5
- Hundreds: 1 + 6 = 7
→ Answer:
756
3.
415 + 412
- Ones: 5 + 2 = 7
- Tens: 1 + 1 = 2
- Hundreds: 4 + 4 = 8
→ Answer:
827
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Second row:
4.
112 + 221
- Ones: 2 + 1 = 3
- Tens: 1 + 2 = 3
- Hundreds: 1 + 2 = 3
→ Answer:
333
5.
634 + 242
- Ones: 4 + 2 = 6
- Tens: 3 + 4 = 7
- Hundreds: 6 + 2 = 8
→ Answer:
876
6.
356 + 323
- Ones: 6 + 3 = 9
- Tens: 5 + 2 = 7
- Hundreds: 3 + 3 = 6
→ Answer:
679
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Third row:
7.
252 + 134
- Ones: 2 + 4 = 6
- Tens: 5 + 3 = 8
- Hundreds: 2 + 1 = 3
→ Answer:
386
8.
321 + 243
- Ones: 1 + 3 = 4
- Tens: 2 + 4 = 6
- Hundreds: 3 + 2 = 5
→ Answer:
564
9.
542 + 233
- Ones: 2 + 3 = 5
- Tens: 4 + 3 = 7
- Hundreds: 5 + 2 = 7
→ Answer:
775
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Final Answer:
565, 756, 827, 333, 876, 679, 386, 564, 775
Parent Tip: Review the logic above to help your child master the concept of 3 digit addition worksheet for grade 1.
