Subtraction with Regrouping: 520 − 172

Subtraction with Regrouping Calculator

What is 520 − 172?

Answer

520 − 172 =

348

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

520 − 172 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.
		4	11	+10
		5(was 5, now 4)	2(was 2, now 11)	0 (was 0, now 10)
	−	1	7	2
		3	4	8

Column by column: 520 − 172

Ones: 0 is less than 2 — borrow 1 ten: tens 2 → 1; 10 − 2 = 8 — write 8.
Tens: after borrowing, 1; 1 is less than 7 — borrow 1 hundred: hundreds 5 → 4; 11 − 7 = 4 — write 4.
Hundreds: after borrowing, 4; 4 − 1 = 3 — write 3.

520 − 172 = 348

Second check: 520 − 348 = 172

Similar examples to practise

Related Calculations

348 + 172 = 520 - 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 172

Example	Difference
344 − 172	172
359 − 172	187
375 − 172	203
386 − 172	214
411 − 172	239
428 − 172	256
440 − 172	268
463 − 172	291
479 − 172	307
497 − 172	325
520 − 172	348
526 − 172	354
548 − 172	376
561 − 172	389
574 − 172	402
599 − 172	427
625 − 172	453
640 − 172	468
657 − 172	485
691 − 172	519

FAQ

What is 520 − 172?

520 − 172 = 348

How do you check that 520 − 172 = 348?

Add the difference and the subtrahend: 348 + 172 = 520. Getting the minuend back means the difference is right.

How many times do you borrow in 520 − 172?

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