Let’s solve each addition problem step by step. We’ll add the numbers column by column, starting from the right (ones place), then tens, then hundreds. If any column adds up to 10 or more, we “regroup” — that means we carry over the extra to the next column on the left.
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Problem 1: 203 + 187
- Ones: 3 + 7 = 10 → write 0, carry 1
- Tens: 0 + 8 + 1 (carry) = 9
- Hundreds: 2 + 1 = 3
→
Answer: 390
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Problem 2: 185 + 705
- Ones: 5 + 5 = 10 → write 0, carry 1
- Tens: 8 + 0 + 1 = 9
- Hundreds: 1 + 7 = 8
→
Answer: 890
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Problem 3: 534 + 349
- Ones: 4 + 9 = 13 → write 3, carry 1
- Tens: 3 + 4 + 1 = 8
- Hundreds: 5 + 3 = 8
→
Answer: 883
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Problem 4: 126 + 476
- Ones: 6 + 6 = 12 → write 2, carry 1
- Tens: 2 + 7 + 1 = 10 → write 0, carry 1
- Hundreds: 1 + 4 + 1 = 6
→
Answer: 602
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Problem 5: 552 + 257
- Ones: 2 + 7 = 9
- Tens: 5 + 5 = 10 → write 0, carry 1
- Hundreds: 5 + 2 + 1 = 8
→
Answer: 809
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Problem 6: 133 + 257
- Ones: 3 + 7 = 10 → write 0, carry 1
- Tens: 3 + 5 + 1 = 9
- Hundreds: 1 + 2 = 3
→
Answer: 390
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Problem 7: 414 + 157
- Ones: 4 + 7 = 11 → write 1, carry 1
- Tens: 1 + 5 + 1 = 7
- Hundreds: 4 + 1 = 5
→
Answer: 571
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Problem 8: 451 + 277
- Ones: 1 + 7 = 8
- Tens: 5 + 7 = 12 → write 2, carry 1
- Hundreds: 4 + 2 + 1 = 7
→
Answer: 728
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Problem 9: 296 + 482
- Ones: 6 + 2 = 8
- Tens: 9 + 8 = 17 → write 7, carry 1
- Hundreds: 2 + 4 + 1 = 7
→
Answer: 778
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Problem 10: 753 + 174
- Ones: 3 + 4 = 7
- Tens: 5 + 7 = 12 → write 2, carry 1
- Hundreds: 7 + 1 + 1 = 9
→
Answer: 927
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Problem 11: 262 + 341
- Ones: 2 + 1 = 3
- Tens: 6 + 4 = 10 → write 0, carry 1
- Hundreds: 2 + 3 + 1 = 6
→
Answer: 603
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Problem 12: 273 + 475
- Ones: 3 + 5 = 8
- Tens: 7 + 7 = 14 → write 4, carry 1
- Hundreds: 2 + 4 + 1 = 7
→
Answer: 748
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Problem 13: 577 + 149
- Ones: 7 + 9 = 16 → write 6, carry 1
- Tens: 7 + 4 + 1 = 12 → write 2, carry 1
- Hundreds: 5 + 1 + 1 = 7
→
Answer: 726
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Problem 14: 748 + 152
- Ones: 8 + 2 = 10 → write 0, carry 1
- Tens: 4 + 5 + 1 = 10 → write 0, carry 1
- Hundreds: 7 + 1 + 1 = 9
→
Answer: 900
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Problem 15: 549 + 379
- Ones: 9 + 9 = 18 → write 8, carry 1
- Tens: 4 + 7 + 1 = 12 → write 2, carry 1
- Hundreds: 5 + 3 + 1 = 9
→
Answer: 928
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Problem 16: 578 + 263
- Ones: 8 + 3 = 11 → write 1, carry 1
- Tens: 7 + 6 + 1 = 14 → write 4, carry 1
- Hundreds: 5 + 2 + 1 = 8
→
Answer: 841
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Final Answer:
203 + 187 = 390
185 + 705 = 890
534 + 349 = 883
126 + 476 = 602
552 + 257 = 809
133 + 257 = 390
414 + 157 = 571
451 + 277 = 728
296 + 482 = 778
753 + 174 = 927
262 + 341 = 603
273 + 475 = 748
577 + 149 = 726
748 + 152 = 900
549 + 379 = 928
578 + 263 = 841
Parent Tip: Review the logic above to help your child master the concept of addition worksheet two digit with regrouping.
