Subtraction with Regrouping: 80 − 28

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 80 − 28?

Answer

80 − 28 =
52

With regrouping: 1 borrow — from the tens

80 − 28 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.
7+10
8(was 8, now 7)0 (was 0, now 10)
−28
52

Column by column: 80 − 28

  • Ones: 0 is less than 8 — borrow 1 ten: tens 8 → 7; 10 − 8 = 2 — write 2.
  • Tens: after borrowing, 7; 7 − 2 = 5 — write 5.

80 − 28 = 52

Second check: 80 − 52 = 28

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Recalculate with different values ↑

Column subtractions of 28

ExampleDifference
56 − 2828
62 − 2834
64 − 2836
67 − 2839
69 − 2841
73 − 2845
75 − 2847
80 − 2852
82 − 2854
86 − 2858
91 − 2863
93 − 2865
95 − 2867
97 − 2869
99 − 2871
100 − 2872
102 − 2874
104 − 2876
106 − 2878
111 − 2883

FAQ

What is 80 − 28?

80 − 28 = 52

How do you check that 80 − 28 = 52?

Add the difference and the subtrahend: 52 + 28 = 80. Getting the minuend back means the difference is right.

How many times do you borrow in 80 − 28?

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