Column Addition: 63 + 15

Addition with Regrouping Calculator

What is 63 + 15?

Answer

63 + 15 =

78

No regrouping: each column is added on its own

63 + 15 in a column. No carries.
		6	3
	+	1	5
		7	8

Column by column: 63 + 15

Ones: 3 + 5 = 8 — write 8.
Tens: 6 + 1 = 7 — write 7.

63 + 15 = 78

Second check: 78 − 63 = 15

Similar examples to practise

Related Calculations

78 − 15 = 63 - 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
28 + 15	43
34 + 15	49
36 + 15	51
39 + 15	54
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

FAQ

What is 63 + 15?

63 + 15 = 78

How do you check that 63 + 15 = 78?

Subtract one addend from the sum: 78 − 15 = 63, and 78 − 63 = 15. Getting the other addend back means the sum is right.

How many carries are there in 63 + 15?

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

Is 15 + 63 the same as 63 + 15?

Yes. Addition is commutative, so both give 78; the column looks the same with either number on top.

See Also