Subtraction with Regrouping: 90 − 23

Subtraction with Regrouping Calculator

What is 90 − 23?

Answer

90 − 23 =

67

With regrouping: 1 borrow — from the tens

90 − 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.
		8	+10
		9(was 9, now 8)	0 (was 0, now 10)
	−	2	3
		6	7

Column by column: 90 − 23

Ones: 0 is less than 3 — borrow 1 ten: tens 9 → 8; 10 − 3 = 7 — write 7.
Tens: after borrowing, 8; 8 − 2 = 6 — write 6.

90 − 23 = 67

Second check: 90 − 67 = 23

Similar examples to practise

Related Calculations

67 + 23 = 90 - 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
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
106 − 23	83
108 − 23	85
112 − 23	89

FAQ

What is 90 − 23?

90 − 23 = 67

How do you check that 90 − 23 = 67?

Add the difference and the subtrahend: 67 + 23 = 90. Getting the minuend back means the difference is right.

How many times do you borrow in 90 − 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