Subtraction with Regrouping: 81 − 23

Subtraction with Regrouping Calculator

What is 81 − 23?

Answer

81 − 23 =

58

With regrouping: 1 borrow — from the tens

81 − 23 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.
		7	+10
		8(was 8, now 7)	1 (was 1, now 11)
	−	2	3
		5	8

Column by column: 81 − 23

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

81 − 23 = 58

Second check: 81 − 58 = 23

Similar examples to practise

Related Calculations

58 + 23 = 81 - 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 23

Example	Difference
49 − 23	26
51 − 23	28
57 − 23	34
59 − 23	36
62 − 23	39
64 − 23	41
68 − 23	45
70 − 23	47
75 − 23	52
77 − 23	54
81 − 23	58
86 − 23	63
88 − 23	65
90 − 23	67
92 − 23	69
94 − 23	71
97 − 23	74
99 − 23	76
100 − 23	77
101 − 23	78

FAQ

What is 81 − 23?

81 − 23 = 58

How do you check that 81 − 23 = 58?

Add the difference and the subtrahend: 58 + 23 = 81. Getting the minuend back means the difference is right.

How many times do you borrow in 81 − 23?

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