Subtraction with Regrouping: 84 − 39

Subtraction with Regrouping Calculator

What is 84 − 39?

Answer

84 − 39 =

45

With regrouping: 1 borrow — from the tens

84 − 39 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)	4 (was 4, now 14)
	−	3	9
		4	5

Column by column: 84 − 39

Ones: 4 is less than 9 — borrow 1 ten: tens 8 → 7; 14 − 9 = 5 — write 5.
Tens: after borrowing, 7; 7 − 3 = 4 — write 4.

84 − 39 = 45

Second check: 84 − 45 = 39

Similar examples to practise

Related Calculations

45 + 39 = 84 - 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 39

Example	Difference
78 − 39	39
80 − 39	41
84 − 39	45
86 − 39	47
91 − 39	52
93 − 39	54
97 − 39	58
102 − 39	63
104 − 39	65
106 − 39	67
108 − 39	69
110 − 39	71
113 − 39	74
115 − 39	76
117 − 39	78
122 − 39	83
124 − 39	85
128 − 39	89
131 − 39	92
133 − 39	94

FAQ

What is 84 − 39?

84 − 39 = 45

How do you check that 84 − 39 = 45?

Add the difference and the subtrahend: 45 + 39 = 84. Getting the minuend back means the difference is right.

How many times do you borrow in 84 − 39?

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