Subtraction with Regrouping: 842 − 389

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 842 − 389?

Answer

842 − 389 =
453

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

842 − 389 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.
713+10
8(was 8, now 7)4(was 4, now 13)2 (was 2, now 12)
−389
453

Column by column: 842 − 389

  • Ones: 2 is less than 9 — borrow 1 ten: tens 4 → 3; 12 − 9 = 3 — write 3.
  • Tens: after borrowing, 3; 3 is less than 8 — borrow 1 hundred: hundreds 8 → 7; 13 − 8 = 5 — write 5.
  • Hundreds: after borrowing, 7; 7 − 3 = 4 — write 4.

842 − 389 = 453

Second check: 842 − 453 = 389

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Column subtractions of 389

ExampleDifference
837 − 389448
838 − 389449
839 − 389450
840 − 389451
841 − 389452
842 − 389453
843 − 389454
844 − 389455
845 − 389456
846 − 389457
847 − 389458

FAQ

What is 842 − 389?

842 − 389 = 453

How do you check that 842 − 389 = 453?

Add the difference and the subtrahend: 453 + 389 = 842. Getting the minuend back means the difference is right.

How many times do you borrow in 842 − 389?

2 borrows: 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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