Subtraction with Regrouping: 640 − 172
Subtraction with Regrouping Calculator
What is 640 − 172?
Answer
640 − 172 =
468
With regrouping: 2 borrows — from the tens and the hundreds
| 5 | 13 | +10 | |
| 0 (was 0, now 10) | |||
| − | 1 | 7 | 2 |
| 4 | 6 | 8 |
Column by column: 640 − 172
- Ones: 0 is less than 2 — borrow 1 ten: tens 4 → 3; 10 − 2 = 8 — write 8.
- Tens: after borrowing, 3; 3 is less than 7 — borrow 1 hundred: hundreds 6 → 5; 13 − 7 = 6 — write 6.
- Hundreds: after borrowing, 5; 5 − 1 = 4 — write 4.
640 − 172 = 468
Second check: 640 − 468 = 172
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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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