Subtraction with Regrouping: 90 − 19

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 90 − 19?

Answer

90 − 19 =
71

With regrouping: 1 borrow — from the tens

90 − 19 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.
8+10
9(was 9, now 8)0 (was 0, now 10)
−19
71

Column by column: 90 − 19

  • Ones: 0 is less than 9 — borrow 1 ten: tens 9 → 8; 10 − 9 = 1 — write 1.
  • Tens: after borrowing, 8; 8 − 1 = 7 — write 7.

90 − 19 = 71

Second check: 90 − 71 = 19

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Recalculate with different values ↑

Column subtractions of 19

ExampleDifference
60 − 1941
64 − 1945
66 − 1947
71 − 1952
73 − 1954
77 − 1958
82 − 1963
84 − 1965
86 − 1967
88 − 1969
90 − 1971
93 − 1974
95 − 1976
97 − 1978
102 − 1983
104 − 1985
108 − 1989
111 − 1992
113 − 1994
117 − 1998

FAQ

What is 90 − 19?

90 − 19 = 71

How do you check that 90 − 19 = 71?

Add the difference and the subtrahend: 71 + 19 = 90. Getting the minuend back means the difference is right.

How many times do you borrow in 90 − 19?

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