Subtraction with Regrouping: 34 − 15

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 34 − 15?

Answer

34 − 15 =
19

With regrouping: 1 borrow — from the tens

34 − 15 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.
2+10
3(was 3, now 2)4 (was 4, now 14)
−15
19

Column by column: 34 − 15

  • Ones: 4 is less than 5 — borrow 1 ten: tens 3 → 2; 14 − 5 = 9 — write 9.
  • Tens: after borrowing, 2; 2 − 1 = 1 — write 1.

34 − 15 = 19

Second check: 34 − 19 = 15

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Column subtractions of 15

ExampleDifference
30 − 1515
32 − 1517
34 − 1519
38 − 1523
41 − 1526
43 − 1528
49 − 1534
51 − 1536
54 − 1539
56 − 1541
60 − 1545
62 − 1547
67 − 1552
69 − 1554
73 − 1558
78 − 1563
80 − 1565
82 − 1567
84 − 1569
86 − 1571

FAQ

What is 34 − 15?

34 − 15 = 19

How do you check that 34 − 15 = 19?

Add the difference and the subtrahend: 19 + 15 = 34. Getting the minuend back means the difference is right.

How many times do you borrow in 34 − 15?

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

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