Subtraction with Regrouping: 321 − 149
Subtraction with Regrouping Calculator
What is 321 − 149?
Answer
321 − 149 =
172
With regrouping: 2 borrows — from the tens and the hundreds
| 2 | 11 | +10 | |
| 1 (was 1, now 11) | |||
| − | 1 | 4 | 9 |
| 1 | 7 | 2 |
Column by column: 321 − 149
- Ones: 1 is less than 9 — borrow 1 ten: tens 2 → 1; 11 − 9 = 2 — write 2.
- Tens: after borrowing, 1; 1 is less than 4 — borrow 1 hundred: hundreds 3 → 2; 11 − 4 = 7 — write 7.
- Hundreds: after borrowing, 2; 2 − 1 = 1 — write 1.
321 − 149 = 172
Second check: 321 − 172 = 149
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See Also
- Addition with Regrouping Calculator - Column addition step by step, with every carry
- Long Division Calculator - Step-by-step long division with detailed explanation
- Long Multiplication Calculator - Column multiplication with partial products, step by step
- Subtracting Fractions Calculator - Subtract fractions, mixed numbers and whole numbers step by step
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