Subtraction with Regrouping: 121 − 23

Subtraction with Regrouping Calculator

What is 121 − 23?

Answer

121 − 23 =

98

With regrouping: 2 borrows — from the tens and the hundreds

121 − 23 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	11	+10
		1(was 1, now 0)	2(was 2, now 11)	1 (was 1, now 11)
	−		2	3
			9	8

Column by column: 121 − 23

Ones: 1 is less than 3 — borrow 1 ten: tens 2 → 1; 11 − 3 = 8 — write 8.
Tens: after borrowing, 1; 1 is less than 2 — borrow 1 hundred: hundreds 1 → 0; 11 − 2 = 9 — write 9.
Hundreds: after borrowing, 0 — a leading zero is not written.

121 − 23 = 98

Second check: 121 − 98 = 23

Similar examples to practise

Related Calculations

98 + 23 = 121 - 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 23

Example	Difference
94 − 23	71
97 − 23	74
99 − 23	76
100 − 23	77
101 − 23	78
106 − 23	83
108 − 23	85
112 − 23	89
115 − 23	92
117 − 23	94
121 − 23	98
128 − 23	105
159 − 23	136
195 − 23	172
200 − 23	177
226 − 23	203
262 − 23	239
291 − 23	268
300 − 23	277
330 − 23	307

FAQ

What is 121 − 23?

121 − 23 = 98

How do you check that 121 − 23 = 98?

Add the difference and the subtrahend: 98 + 23 = 121. Getting the minuend back means the difference is right.

How many times do you borrow in 121 − 23?

2 borrows: each time the top digit was smaller than the one below it, 1 was borrowed from the column on the left.

See Also