Subtraction with Regrouping: 391 − 15

Subtraction with Regrouping Calculator

What is 391 − 15?

Answer

391 − 15 =

376

With regrouping: 1 borrow — from the tens

391 − 15 in a column. Above the columns: the values after borrowing — a crossed-out digit is replaced by the number above it; +10 marks a column that received a borrowed ten.
			8	+10
		3	9(was 9, now 8)	1 (was 1, now 11)
	−		1	5
		3	7	6

Column by column: 391 − 15

Ones: 1 is less than 5 — borrow 1 ten: tens 9 → 8; 11 − 5 = 6 — write 6.
Tens: after borrowing, 8; 8 − 1 = 7 — write 7.
Hundreds: nothing to subtract — write 3.

391 − 15 = 376

Second check: 391 − 376 = 15

Similar examples to practise

Related Calculations

376 + 15 = 391 - Addition with Regrouping

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

Recalculate with different values ↑

Column subtractions of 15

Example	Difference
100 − 15	85
104 − 15	89
107 − 15	92
109 − 15	94
113 − 15	98
120 − 15	105
151 − 15	136
187 − 15	172
218 − 15	203
254 − 15	239
283 − 15	268
322 − 15	307
363 − 15	348
391 − 15	376
417 − 15	402
468 − 15	453
500 − 15	485
551 − 15	536
593 − 15	578
662 − 15	647

FAQ

What is 391 − 15?

391 − 15 = 376

How do you check that 391 − 15 = 376?

Add the difference and the subtrahend: 376 + 15 = 391. Getting the minuend back means the difference is right.

How many times do you borrow in 391 − 15?

1 borrow: each time the top digit was smaller than the one below it, 1 was borrowed from the column on the left.

See Also