Subtraction with Regrouping: 124 − 19

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 124 − 19?

Answer

124 − 19 =
105

With regrouping: 1 borrow — from the tens

124 − 19 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.
1+10
1 2(was 2, now 1)4 (was 4, now 14)
−19
105

Column by column: 124 − 19

  • Ones: 4 is less than 9 — borrow 1 ten: tens 2 → 1; 14 − 9 = 5 — write 5.
  • Tens: after borrowing, 1; 1 − 1 = 0 — write 0.
  • Hundreds: nothing to subtract — write 1.

124 − 19 = 105

Second check: 124 − 105 = 19

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Column subtractions of 19

ExampleDifference
90 − 1971
93 − 1974
95 − 1976
97 − 1978
102 − 1983
104 − 1985
108 − 1989
111 − 1992
113 − 1994
117 − 1998
124 − 19105
155 − 19136
191 − 19172
222 − 19203
258 − 19239
287 − 19268
326 − 19307
367 − 19348
395 − 19376
400 − 19381

FAQ

What is 124 − 19?

124 − 19 = 105

How do you check that 124 − 19 = 105?

Add the difference and the subtrahend: 105 + 19 = 124. Getting the minuend back means the difference is right.

How many times do you borrow in 124 − 19?

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