Subtraction with Regrouping: 91 − 17

Subtraction with Regrouping Calculator

What is 91 − 17?

Answer

91 − 17 =

74

With regrouping: 1 borrow — from the tens

91 − 17 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	7
		7	4

Column by column: 91 − 17

Ones: 1 is less than 7 — borrow 1 ten: tens 9 → 8; 11 − 7 = 4 — write 4.
Tens: after borrowing, 8; 8 − 1 = 7 — write 7.

91 − 17 = 74

Second check: 91 − 74 = 17

Similar examples to practise

Related Calculations

74 + 17 = 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 17

Example	Difference
62 − 17	45
64 − 17	47
69 − 17	52
71 − 17	54
75 − 17	58
80 − 17	63
82 − 17	65
84 − 17	67
86 − 17	69
88 − 17	71
91 − 17	74
93 − 17	76
95 − 17	78
100 − 17	83
102 − 17	85
106 − 17	89
109 − 17	92
111 − 17	94
115 − 17	98
122 − 17	105

FAQ

What is 91 − 17?

91 − 17 = 74

How do you check that 91 − 17 = 74?

Add the difference and the subtrahend: 74 + 17 = 91. Getting the minuend back means the difference is right.

How many times do you borrow in 91 − 17?

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