Subtraction with Regrouping: 81 − 36

Subtraction with Regrouping Calculator

What is 81 − 36?

Answer

81 − 36 =

45

With regrouping: 1 borrow — from the tens

81 − 36 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.
		7	+10
		8(was 8, now 7)	1 (was 1, now 11)
	−	3	6
		4	5

Column by column: 81 − 36

Ones: 1 is less than 6 — borrow 1 ten: tens 8 → 7; 11 − 6 = 5 — write 5.
Tens: after borrowing, 7; 7 − 3 = 4 — write 4.

81 − 36 = 45

Second check: 81 − 45 = 36

Similar examples to practise

Related Calculations

45 + 36 = 81 - 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 36

Example	Difference
72 − 36	36
75 − 36	39
77 − 36	41
81 − 36	45
83 − 36	47
88 − 36	52
90 − 36	54
94 − 36	58
99 − 36	63
100 − 36	64
101 − 36	65
103 − 36	67
105 − 36	69
107 − 36	71
110 − 36	74
112 − 36	76
114 − 36	78
119 − 36	83
121 − 36	85
125 − 36	89

FAQ

What is 81 − 36?

81 − 36 = 45

How do you check that 81 − 36 = 45?

Add the difference and the subtrahend: 45 + 36 = 81. Getting the minuend back means the difference is right.

How many times do you borrow in 81 − 36?

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