Addition with Regrouping: 78 + 71

Addition with Regrouping Calculator

What is 78 + 71?

Answer

78 + 71 =

149

The sum is longer than the addends: 1 carry — into the hundreds; the last one makes a new digit

78 + 71 in a column. Carries are the small circled digits above the columns.
		1carry
			7	8
	+		7	1
		1	4	9

Column by column: 78 + 71

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

78 + 71 = 149

Second check: 149 − 78 = 71

Similar examples to practise

Related Calculations

149 − 71 = 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 71

Example	Sum
71 + 71	142
74 + 71	145
76 + 71	147
78 + 71	149
83 + 71	154
85 + 71	156
89 + 71	160
92 + 71	163
94 + 71	165
98 + 71	169
105 + 71	176
129 + 71	200
136 + 71	207
172 + 71	243
203 + 71	274
229 + 71	300
239 + 71	310
268 + 71	339
307 + 71	378
348 + 71	419

FAQ

What is 78 + 71?

78 + 71 = 149

How do you check that 78 + 71 = 149?

Subtract one addend from the sum: 149 − 71 = 78, and 149 − 78 = 71. Getting the other addend back means the sum is right.

How many carries are there in 78 + 71?

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 71 + 78 the same as 78 + 71?

Yes. Addition is commutative, so both give 149; the column looks the same with either number on top.

See Also