Subtraction with Regrouping: 121 − 47

Subtraction with Regrouping Calculator

What is 121 − 47?

Answer

121 − 47 =

74

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

121 − 47 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)
	−		4	7
			7	4

Column by column: 121 − 47

Ones: 1 is less than 7 — borrow 1 ten: tens 2 → 1; 11 − 7 = 4 — write 4.
Tens: after borrowing, 1; 1 is less than 4 — borrow 1 hundred: hundreds 1 → 0; 11 − 4 = 7 — write 7.
Hundreds: after borrowing, 0 — a leading zero is not written.

121 − 47 = 74

Second check: 121 − 74 = 47

Similar examples to practise

Related Calculations

74 + 47 = 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 47

Example	Difference
94 − 47	47
99 − 47	52
100 − 47	53
101 − 47	54
105 − 47	58
110 − 47	63
112 − 47	65
114 − 47	67
116 − 47	69
118 − 47	71
121 − 47	74
123 − 47	76
125 − 47	78
130 − 47	83
132 − 47	85
136 − 47	89
139 − 47	92
141 − 47	94
145 − 47	98
152 − 47	105

FAQ

What is 121 − 47?

121 − 47 = 74

How do you check that 121 − 47 = 74?

Add the difference and the subtrahend: 74 + 47 = 121. Getting the minuend back means the difference is right.

How many times do you borrow in 121 − 47?

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