Subtraction with Regrouping: 64 − 17

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 64 − 17?

Answer

64 − 17 =
47

With regrouping: 1 borrow — from the tens

64 − 17 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.
5+10
6(was 6, now 5)4 (was 4, now 14)
−17
47

Column by column: 64 − 17

  • Ones: 4 is less than 7 — borrow 1 ten: tens 6 → 5; 14 − 7 = 7 — write 7.
  • Tens: after borrowing, 5; 5 − 1 = 4 — write 4.

64 − 17 = 47

Second check: 64 − 47 = 17

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Recalculate with different values ↑

Column subtractions of 17

ExampleDifference
34 − 1717
36 − 1719
40 − 1723
43 − 1726
45 − 1728
51 − 1734
53 − 1736
56 − 1739
58 − 1741
62 − 1745
64 − 1747
69 − 1752
71 − 1754
75 − 1758
80 − 1763
82 − 1765
84 − 1767
86 − 1769
88 − 1771
91 − 1774

FAQ

What is 64 − 17?

64 − 17 = 47

How do you check that 64 − 17 = 47?

Add the difference and the subtrahend: 47 + 17 = 64. Getting the minuend back means the difference is right.

How many times do you borrow in 64 − 17?

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

See Also