Subtraction with Regrouping: 317 − 78

Subtraction with Regrouping Calculator

What is 317 − 78?

Answer

317 − 78 =

239

With regrouping: 2 borrows — from the tens and the hundreds

317 − 78 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.
		2	10	+10
		3(was 3, now 2)	1(was 1, now 10)	7 (was 7, now 17)
	−		7	8
		2	3	9

Column by column: 317 − 78

Ones: 7 is less than 8 — borrow 1 ten: tens 1 → 0; 17 − 8 = 9 — write 9.
Tens: after borrowing, 0; 0 is less than 7 — borrow 1 hundred: hundreds 3 → 2; 10 − 7 = 3 — write 3.
Hundreds: after borrowing, 2; nothing to subtract — write 2.

317 − 78 = 239

Second check: 317 − 239 = 78

Similar examples to practise

Related Calculations

239 + 78 = 317 - 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 78

Example	Difference
161 − 78	83
163 − 78	85
167 − 78	89
170 − 78	92
172 − 78	94
176 − 78	98
183 − 78	105
214 − 78	136
250 − 78	172
281 − 78	203
317 − 78	239
346 − 78	268
385 − 78	307
426 − 78	348
454 − 78	376
480 − 78	402
531 − 78	453
563 − 78	485
614 − 78	536
656 − 78	578

FAQ

What is 317 − 78?

317 − 78 = 239

How do you check that 317 − 78 = 239?

Add the difference and the subtrahend: 239 + 78 = 317. Getting the minuend back means the difference is right.

How many times do you borrow in 317 − 78?

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

See Also