Addition with Regrouping: 15 + 15

Addition with Regrouping Calculator

What is 15 + 15?

Answer

15 + 15 =

30

With regrouping: 1 carry — into the tens

15 + 15 in a column. Carries are the small circled digits above the columns.
		1carry
		1	5
	+	1	5
		3	0

Column by column: 15 + 15

Ones: 5 + 5 = 10 — write 0, carry 1.
Tens: 1 + 1 + 1 = 3 — write 3.

15 + 15 = 30

Similar examples to practise

Related Calculations

30 − 15 = 15 - 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
15 + 15	30
17 + 15	32
19 + 15	34
23 + 15	38
26 + 15	41
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

FAQ

What is 15 + 15?

15 + 15 = 30

How do you check that 15 + 15 = 30?

Subtract one addend from the sum: 30 − 15 = 15. Getting the other addend back means the sum is right.

How many carries are there in 15 + 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.

See Also