Subtraction with Regrouping: 27,035 − 3,579

Subtraction with Regrouping Calculator

What is 27,035 − 3,579?

Answer

27,035 − 3,579 =

23,456

With regrouping across a zero: 3 borrows — there are no hundreds to borrow from, so 1 thousand becomes 10 hundreds, and 1 hundred goes to the tens

Ones: 5 is less than 9 — borrow 1 ten: tens 3 → 2; 15 − 9 = 6 — write 6.
Tens: after borrowing, 2; 2 is less than 7 — borrow 1 thousand across the zero: thousands 7 → 6, hundreds 0 → 9; 12 − 7 = 5 — write 5.
Hundreds: after borrowing, 9; 9 − 5 = 4 — write 4.
Thousands: after borrowing, 6; 6 − 3 = 3 — write 3.
Ten thousands: nothing to subtract — write 2.

27,035 − 3,579 = 23,456

Second check: 27,035 − 23,456 = 3,579

Similar examples to practise

27,035 − 3,579 = 23,456

Add the difference and the subtrahend: 23,456 + 3,579 = 27,035. Getting the minuend back means the difference is right.

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

The zero has nothing to lend, so it first borrows 1 from its left neighbour and becomes 10; then it lends 1 to the column on its right and keeps 9.