Column Addition: 71 + 15

Addition with Regrouping Calculator

What is 71 + 15?

Answer

71 + 15 =

86

No regrouping: each column is added on its own

71 + 15 in a column. No carries.
		7	1
	+	1	5
		8	6

Column by column: 71 + 15

Ones: 1 + 5 = 6 — write 6.
Tens: 7 + 1 = 8 — write 8.

71 + 15 = 86

Second check: 86 − 71 = 15

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Related Calculations

86 − 15 = 71 - Column Subtraction

See Also

Subtraction with Regrouping Calculator - Column subtraction step by step, with borrowing across zeros
Long Multiplication Calculator - Column multiplication with partial products, step by step
Long Division Calculator - Step-by-step long division with detailed explanation
Adding Fractions Calculator - Add fractions, mixed numbers and whole numbers step by step

Recalculate with different values ↑

Column additions with 15

Example	Sum
41 + 15	56
45 + 15	60
47 + 15	62
52 + 15	67
54 + 15	69
58 + 15	73
63 + 15	78
65 + 15	80
67 + 15	82
69 + 15	84
71 + 15	86
74 + 15	89
76 + 15	91
78 + 15	93
83 + 15	98
85 + 15	100
89 + 15	104
92 + 15	107
94 + 15	109
98 + 15	113

FAQ

What is 71 + 15?

71 + 15 = 86

How do you check that 71 + 15 = 86?

Subtract one addend from the sum: 86 − 15 = 71, and 86 − 71 = 15. Getting the other addend back means the sum is right.

How many carries are there in 71 + 15?

None: no column adds up to 10 or more, so every digit of the sum is written straight away.

Is 15 + 71 the same as 71 + 15?

Yes. Addition is commutative, so both give 86; the column looks the same with either number on top.

See Also