Addition with Regrouping: 78 + 69

Addition with Regrouping Calculator

What is 78 + 69?

Answer

78 + 69 =

147

The sum is longer than the addends: 2 carries — into the tens and the hundreds; the last one makes a new digit

78 + 69 in a column. Carries are the small circled digits above the columns.
		1carry	1carry
			7	8
	+		6	9
		1	4	7

Column by column: 78 + 69

Ones: 8 + 9 = 17 — write 7, carry 1.
Tens: 7 + 6 + 1 = 14 — write 4, carry 1.
Hundreds: the carried 1 — write 1.

78 + 69 = 147

Second check: 147 − 78 = 69

Similar examples to practise

Related Calculations

147 − 69 = 78 - 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 69

Example	Sum
69 + 69	138
71 + 69	140
74 + 69	143
76 + 69	145
78 + 69	147
83 + 69	152
85 + 69	154
89 + 69	158
92 + 69	161
94 + 69	163
98 + 69	167
105 + 69	174
136 + 69	205
172 + 69	241
203 + 69	272
239 + 69	308
268 + 69	337
307 + 69	376
348 + 69	417
376 + 69	445

FAQ

What is 78 + 69?

78 + 69 = 147

How do you check that 78 + 69 = 147?

Subtract one addend from the sum: 147 − 69 = 78, and 147 − 78 = 69. Getting the other addend back means the sum is right.

How many carries are there in 78 + 69?

2 carries: 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 69 + 78 the same as 78 + 69?

Yes. Addition is commutative, so both give 147; the column looks the same with either number on top.

See Also