Subtraction with Regrouping: 243 − 71

Subtraction with Regrouping Calculator

What is 243 − 71?

Answer

243 − 71 =

172

With regrouping: 1 borrow — from the hundreds

243 − 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.
		1	+10
		2(was 2, now 1)	4 (was 4, now 14)	3
	−		7	1
		1	7	2

Column by column: 243 − 71

Ones: 3 − 1 = 2 — write 2.
Tens: 4 is less than 7 — borrow 1 hundred: hundreds 2 → 1; 14 − 7 = 7 — write 7.
Hundreds: after borrowing, 1; nothing to subtract — write 1.

243 − 71 = 172

Second check: 243 − 172 = 71

Similar examples to practise

Related Calculations

172 + 71 = 243 - 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
149 − 71	78
154 − 71	83
156 − 71	85
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

FAQ

What is 243 − 71?

243 − 71 = 172

How do you check that 243 − 71 = 172?

Add the difference and the subtrahend: 172 + 71 = 243. Getting the minuend back means the difference is right.

How many times do you borrow in 243 − 71?

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