Subtraction with Regrouping: 100 − 6

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 100 − 6?

Answer

100 − 6 =
94

With regrouping across a zero: 2 borrows — there are no tens to borrow from, so 1 hundred becomes 10 tens, and 1 ten goes to the ones

100 − 6 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.
09+10
1(was 1, now 0)0(was 0, now 9)0 (was 0, now 10)
−6
94

Column by column: 100 − 6

  • Ones: 0 is less than 6 — borrow 1 hundred across the zero: hundreds 1 → 0, tens 0 → 9; 10 − 6 = 4 — write 4.
  • Tens: after borrowing, 9; nothing to subtract — write 9.
  • Hundreds: after borrowing, 0 — a leading zero is not written.

100 − 6 = 94

Second check: 100 − 94 = 6

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ExampleDifference
100 − 694
100 − 1189
100 − 1288
100 − 1585
100 − 1783
100 − 2377
100 − 2476
100 − 2674
100 − 2872
100 − 2971
100 − 3367
100 − 3664
100 − 3763
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100 − 4654
100 − 4753

FAQ

What is 100 − 6?

100 − 6 = 94

How do you check that 100 − 6 = 94?

Add the difference and the subtrahend: 94 + 6 = 100. Getting the minuend back means the difference is right.

How many times do you borrow in 100 − 6?

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

Why does 0 become 9 when borrowing in 100 − 6?

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.

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