Subtraction with Regrouping: 105 − 47

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 105 − 47?

Answer

105 − 47 =
58

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

105 − 47 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)5 (was 5, now 15)
−47
58

Column by column: 105 − 47

  • Ones: 5 is less than 7 — borrow 1 hundred across the zero: hundreds 1 → 0, tens 0 → 9; 15 − 7 = 8 — write 8.
  • Tens: after borrowing, 9; 9 − 4 = 5 — write 5.
  • Hundreds: after borrowing, 0 — a leading zero is not written.

105 − 47 = 58

Second check: 105 − 58 = 47

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Column subtractions of 47

ExampleDifference
94 − 4747
99 − 4752
100 − 4753
101 − 4754
105 − 4758
110 − 4763
112 − 4765
114 − 4767
116 − 4769
118 − 4771
121 − 4774
123 − 4776
125 − 4778
130 − 4783
132 − 4785
136 − 4789
139 − 4792
141 − 4794
145 − 4798
152 − 47105

FAQ

What is 105 − 47?

105 − 47 = 58

How do you check that 105 − 47 = 58?

Add the difference and the subtrahend: 58 + 47 = 105. Getting the minuend back means the difference is right.

How many times do you borrow in 105 − 47?

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 105 − 47?

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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