Subtraction with Regrouping: 80 − 15

Subtraction with Regrouping Calculator

What is 80 − 15?

Answer

80 − 15 =

65

With regrouping: 1 borrow — from the tens

80 − 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.
		7	+10
		8(was 8, now 7)	0 (was 0, now 10)
	−	1	5
		6	5

Column by column: 80 − 15

Ones: 0 is less than 5 — borrow 1 ten: tens 8 → 7; 10 − 5 = 5 — write 5.
Tens: after borrowing, 7; 7 − 1 = 6 — write 6.

80 − 15 = 65

Second check: 80 − 65 = 15

Similar examples to practise

Related Calculations

65 + 15 = 80 - 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
49 − 15	34
51 − 15	36
54 − 15	39
56 − 15	41
60 − 15	45
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

FAQ

What is 80 − 15?

80 − 15 = 65

How do you check that 80 − 15 = 65?

Add the difference and the subtrahend: 65 + 15 = 80. Getting the minuend back means the difference is right.

How many times do you borrow in 80 − 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