Subtraction with Regrouping: 51 − 23

Subtraction with Regrouping Calculator

What is 51 − 23?

Answer

51 − 23 =

28

With regrouping: 1 borrow — from the tens

51 − 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.
		4	+10
		5(was 5, now 4)	1 (was 1, now 11)
	−	2	3
		2	8

Column by column: 51 − 23

Ones: 1 is less than 3 — borrow 1 ten: tens 5 → 4; 11 − 3 = 8 — write 8.
Tens: after borrowing, 4; 4 − 2 = 2 — write 2.

51 − 23 = 28

Second check: 51 − 28 = 23

Similar examples to practise

Related Calculations

28 + 23 = 51 - 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
46 − 23	23
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

FAQ

What is 51 − 23?

51 − 23 = 28

How do you check that 51 − 23 = 28?

Add the difference and the subtrahend: 28 + 23 = 51. Getting the minuend back means the difference is right.

How many times do you borrow in 51 − 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