Subtraction with Regrouping: 217 − 45

Subtraction with Regrouping Calculator

What is 217 − 45?

Answer

217 − 45 =

172

With regrouping: 1 borrow — from the hundreds

217 − 45 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)	1 (was 1, now 11)	7
	−		4	5
		1	7	2

Column by column: 217 − 45

Ones: 7 − 5 = 2 — write 2.
Tens: 1 is less than 4 — borrow 1 hundred: hundreds 2 → 1; 11 − 4 = 7 — write 7.
Hundreds: after borrowing, 1; nothing to subtract — write 1.

217 − 45 = 172

Second check: 217 − 172 = 45

Similar examples to practise

Related Calculations

172 + 45 = 217 - 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 45

Example	Difference
121 − 45	76
123 − 45	78
128 − 45	83
130 − 45	85
134 − 45	89
137 − 45	92
139 − 45	94
143 − 45	98
150 − 45	105
181 − 45	136
217 − 45	172
248 − 45	203
284 − 45	239
313 − 45	268
352 − 45	307
393 − 45	348
421 − 45	376
447 − 45	402
498 − 45	453
530 − 45	485

FAQ

What is 217 − 45?

217 − 45 = 172

How do you check that 217 − 45 = 172?

Add the difference and the subtrahend: 172 + 45 = 217. Getting the minuend back means the difference is right.

How many times do you borrow in 217 − 45?

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