Subtraction with Regrouping: 623 − 45

Subtraction with Regrouping Calculator

What is 623 − 45?

Answer

623 − 45 =

578

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

623 − 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.
		5	11	+10
		6(was 6, now 5)	2(was 2, now 11)	3 (was 3, now 13)
	−		4	5
		5	7	8

Column by column: 623 − 45

Ones: 3 is less than 5 — borrow 1 ten: tens 2 → 1; 13 − 5 = 8 — write 8.
Tens: after borrowing, 1; 1 is less than 4 — borrow 1 hundred: hundreds 6 → 5; 11 − 4 = 7 — write 7.
Hundreds: after borrowing, 5; nothing to subtract — write 5.

623 − 45 = 578

Second check: 623 − 578 = 45

Similar examples to practise

Related Calculations

578 + 45 = 623 - 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
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
581 − 45	536
623 − 45	578
692 − 45	647

FAQ

What is 623 − 45?

623 − 45 = 578

How do you check that 623 − 45 = 578?

Add the difference and the subtrahend: 578 + 45 = 623. Getting the minuend back means the difference is right.

How many times do you borrow in 623 − 45?

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