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Subtraction with Regrouping: 31 − 12

Subtraction with Regrouping Calculator

What is 31 − 12?

Answer

31 − 12 =

19

With regrouping: 1 borrow — from the tens

31 − 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.
		2	+10
		3(was 3, now 2)	1 (was 1, now 11)
	−	1	2
		1	9

Column by column: 31 − 12

Ones: 1 is less than 2 — borrow 1 ten: tens 3 → 2; 11 − 2 = 9 — write 9.
Tens: after borrowing, 2; 2 − 1 = 1 — write 1.

31 − 12 = 19

Second check: 31 − 19 = 12

Similar examples to practise

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Related Calculations

19 + 12 = 31 - 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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<a href="https://calculat.io/en/number/long-subtraction/31--12">31 − 12 = 19 - Subtraction with Regrouping - Calculatio</a>

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31 − 12 = 19 - Subtraction with Regrouping. 31 − 12 = 19. Subtraction with regrouping step by step: 1 borrow, every digit of the difference and an addition check.

https://calculat.io/en/number/long-subtraction/31--12/generated.jpg

Column subtractions of 12

Example	Difference
24 − 12	12
27 − 12	15
29 − 12	17
31 − 12	19
35 − 12	23
38 − 12	26
40 − 12	28
46 − 12	34
48 − 12	36
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

Recalculate with different values ↑

FAQ

What is 31 − 12?

31 − 12 = 19

How do you check that 31 − 12 = 19?

Add the difference and the subtrahend: 19 + 12 = 31. Getting the minuend back means the difference is right.

How many times do you borrow in 31 − 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