Subtraction with Regrouping: 91 − 28

Subtraction with Regrouping Calculator

What is 91 − 28?

Answer

91 − 28 =

63

With regrouping: 1 borrow — from the tens

91 − 28 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)	1 (was 1, now 11)
	−	2	8
		6	3

Column by column: 91 − 28

Ones: 1 is less than 8 — borrow 1 ten: tens 9 → 8; 11 − 8 = 3 — write 3.
Tens: after borrowing, 8; 8 − 2 = 6 — write 6.

91 − 28 = 63

Second check: 91 − 63 = 28

Similar examples to practise

Related Calculations

63 + 28 = 91 - 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 28

Example	Difference
56 − 28	28
62 − 28	34
64 − 28	36
67 − 28	39
69 − 28	41
73 − 28	45
75 − 28	47
80 − 28	52
82 − 28	54
86 − 28	58
91 − 28	63
93 − 28	65
95 − 28	67
97 − 28	69
99 − 28	71
100 − 28	72
102 − 28	74
104 − 28	76
106 − 28	78
111 − 28	83

FAQ

What is 91 − 28?

91 − 28 = 63

How do you check that 91 − 28 = 63?

Add the difference and the subtrahend: 63 + 28 = 91. Getting the minuend back means the difference is right.

How many times do you borrow in 91 − 28?

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