Subtraction with Regrouping: 156 − 71

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 156 − 71?

Answer

156 − 71 =
85

With regrouping: 1 borrow — from the hundreds

156 − 71 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)5 (was 5, now 15)6
−71
85

Column by column: 156 − 71

  • Ones: 6 − 1 = 5 — write 5.
  • Tens: 5 is less than 7 — borrow 1 hundred: hundreds 1 → 0; 15 − 7 = 8 — write 8.
  • Hundreds: after borrowing, 0 — a leading zero is not written.

156 − 71 = 85

Second check: 156 − 85 = 71

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See Also

FAQ

What is 156 − 71?

156 − 71 = 85

How do you check that 156 − 71 = 85?

Add the difference and the subtrahend: 85 + 71 = 156. Getting the minuend back means the difference is right.

How many times do you borrow in 156 − 71?

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