Addition with Regrouping: 647 + 128
Addition with Regrouping Calculator
What is 647 + 128?
Answer
647 + 128 =
775
With regrouping: 1 carry — into the tens
| 1carry | |||
| 6 | 4 | 7 | |
| + | 1 | 2 | 8 |
| 7 | 7 | 5 |
Column by column: 647 + 128
- Ones: 7 + 8 = 15 — write 5, carry 1.
- Tens: 4 + 2 + 1 = 7 — write 7.
- Hundreds: 6 + 1 = 7 — write 7.
647 + 128 = 775
Second check: 775 − 647 = 128
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