Subtraction with Regrouping: 91 − 15

Subtraction with Regrouping Calculator

What is 91 − 15?

Answer

91 − 15 =

76

With regrouping: 1 borrow — from the tens

91 − 15 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)
	−	1	5
		7	6

Column by column: 91 − 15

Ones: 1 is less than 5 — borrow 1 ten: tens 9 → 8; 11 − 5 = 6 — write 6.
Tens: after borrowing, 8; 8 − 1 = 7 — write 7.

91 − 15 = 76

Second check: 91 − 76 = 15

Similar examples to practise

Related Calculations

76 + 15 = 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 15

Example	Difference
62 − 15	47
67 − 15	52
69 − 15	54
73 − 15	58
78 − 15	63
80 − 15	65
82 − 15	67
84 − 15	69
86 − 15	71
89 − 15	74
91 − 15	76
93 − 15	78
98 − 15	83
100 − 15	85
104 − 15	89
107 − 15	92
109 − 15	94
113 − 15	98
120 − 15	105
151 − 15	136

FAQ

What is 91 − 15?

91 − 15 = 76

How do you check that 91 − 15 = 76?

Add the difference and the subtrahend: 76 + 15 = 91. Getting the minuend back means the difference is right.

How many times do you borrow in 91 − 15?

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