Addition with Regrouping: 39 + 39

Addition with Regrouping Calculator

What is 39 + 39?

Answer

39 + 39 =

78

With regrouping: 1 carry — into the tens

39 + 39 in a column. Carries are the small circled digits above the columns.
		1carry
		3	9
	+	3	9
		7	8

Column by column: 39 + 39

Ones: 9 + 9 = 18 — write 8, carry 1.
Tens: 3 + 3 + 1 = 7 — write 7.

39 + 39 = 78

Similar examples to practise

Related Calculations

78 − 39 = 39 - 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 39

Example	Sum
39 + 39	78
41 + 39	80
45 + 39	84
47 + 39	86
52 + 39	91
54 + 39	93
58 + 39	97
63 + 39	102
65 + 39	104
67 + 39	106
69 + 39	108
71 + 39	110
74 + 39	113
76 + 39	115
78 + 39	117
83 + 39	122
85 + 39	124
89 + 39	128
92 + 39	131
94 + 39	133

FAQ

What is 39 + 39?

39 + 39 = 78

How do you check that 39 + 39 = 78?

Subtract one addend from the sum: 78 − 39 = 39. Getting the other addend back means the sum is right.

How many carries are there in 39 + 39?

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.