Addition with Regrouping: 65 + 15

Addition with Regrouping Calculator

What is 65 + 15?

Answer

65 + 15 =

80

With regrouping: 1 carry — into the tens

65 + 15 in a column. Carries are the small circled digits above the columns.
		1carry
		6	5
	+	1	5
		8	0

Column by column: 65 + 15

Ones: 5 + 5 = 10 — write 0, carry 1.
Tens: 6 + 1 + 1 = 8 — write 8.

65 + 15 = 80

Second check: 80 − 65 = 15

Similar examples to practise

Related Calculations

80 − 15 = 65 - Subtraction with Regrouping

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
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
89 + 15	104

FAQ

What is 65 + 15?

65 + 15 = 80

How do you check that 65 + 15 = 80?

Subtract one addend from the sum: 80 − 15 = 65, and 80 − 65 = 15. Getting the other addend back means the sum is right.

How many carries are there in 65 + 15?

1 carry: every time a column added up to 10 or more, its ones digit was written and 1 was carried to the next column on the left.

Is 15 + 65 the same as 65 + 15?

Yes. Addition is commutative, so both give 80; the column looks the same with either number on top.

See Also