Subtraction with Regrouping: 310 − 71

Subtraction with Regrouping Calculator

What is 310 − 71?

Answer

310 − 71 =

239

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

310 − 71 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)	0 (was 0, now 10)
	−		7	1
		2	3	9

Column by column: 310 − 71

Ones: 0 is less than 1 — borrow 1 ten: tens 1 → 0; 10 − 1 = 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.

310 − 71 = 239

Second check: 310 − 239 = 71

Similar examples to practise

Related Calculations

239 + 71 = 310 - 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 71

Example	Difference
160 − 71	89
163 − 71	92
165 − 71	94
169 − 71	98
176 − 71	105
200 − 71	129
207 − 71	136
243 − 71	172
274 − 71	203
300 − 71	229
310 − 71	239
339 − 71	268
378 − 71	307
419 − 71	348
447 − 71	376
473 − 71	402
524 − 71	453
556 − 71	485
607 − 71	536
649 − 71	578

FAQ

What is 310 − 71?

310 − 71 = 239

How do you check that 310 − 71 = 239?

Add the difference and the subtrahend: 239 + 71 = 310. Getting the minuend back means the difference is right.

How many times do you borrow in 310 − 71?

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