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Subtraction with Regrouping: 81 − 12

Subtraction with Regrouping Calculator

What is 81 − 12?

Answer

81 − 12 =

69

With regrouping: 1 borrow — from the tens

81 − 12 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)
	−	1	2
		6	9

Column by column: 81 − 12

Ones: 1 is less than 2 — borrow 1 ten: tens 8 → 7; 11 − 2 = 9 — write 9.
Tens: after borrowing, 7; 7 − 1 = 6 — write 6.

81 − 12 = 69

Second check: 81 − 69 = 12

Similar examples to practise

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Related Calculations

69 + 12 = 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

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81 − 12 = 69 - Subtraction with Regrouping. 81 − 12 = 69. Subtraction with regrouping step by step: 1 borrow, every digit of the difference and an addition check.

https://calculat.io/en/number/long-subtraction/81--12/generated.jpg

Column subtractions of 12

Example	Difference
51 − 12	39
53 − 12	41
57 − 12	45
59 − 12	47
64 − 12	52
66 − 12	54
70 − 12	58
75 − 12	63
77 − 12	65
79 − 12	67
81 − 12	69
83 − 12	71
86 − 12	74
88 − 12	76
90 − 12	78
95 − 12	83
97 − 12	85
100 − 12	88
101 − 12	89
104 − 12	92

Recalculate with different values ↑

FAQ

What is 81 − 12?

81 − 12 = 69

How do you check that 81 − 12 = 69?

Add the difference and the subtrahend: 69 + 12 = 81. Getting the minuend back means the difference is right.

How many times do you borrow in 81 − 12?

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