Subtraction with Regrouping: 128 − 45

Subtraction with Regrouping Calculator

What is 128 − 45?

Answer

128 − 45 =

83

With regrouping: 1 borrow — from the hundreds

128 − 45 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.
		0	+10
		1(was 1, now 0)	2 (was 2, now 12)	8
	−		4	5
			8	3

Column by column: 128 − 45

Ones: 8 − 5 = 3 — write 3.
Tens: 2 is less than 4 — borrow 1 hundred: hundreds 1 → 0; 12 − 4 = 8 — write 8.
Hundreds: after borrowing, 0 — a leading zero is not written.

128 − 45 = 83

Second check: 128 − 83 = 45

Similar examples to practise

Related Calculations

83 + 45 = 128 - 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 45

Example	Difference
99 − 45	54
103 − 45	58
108 − 45	63
110 − 45	65
112 − 45	67
114 − 45	69
116 − 45	71
119 − 45	74
121 − 45	76
123 − 45	78
128 − 45	83
130 − 45	85
134 − 45	89
137 − 45	92
139 − 45	94
143 − 45	98
150 − 45	105
181 − 45	136
217 − 45	172
248 − 45	203

FAQ

What is 128 − 45?

128 − 45 = 83

How do you check that 128 − 45 = 83?

Add the difference and the subtrahend: 83 + 45 = 128. Getting the minuend back means the difference is right.

How many times do you borrow in 128 − 45?

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