Addition with Regrouping: 78 + 65

Addition with Regrouping Calculator

What is 78 + 65?

Answer

78 + 65 =

143

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

78 + 65 in a column. Carries are the small circled digits above the columns.
		1carry	1carry
			7	8
	+		6	5
		1	4	3

Column by column: 78 + 65

Ones: 8 + 5 = 13 — write 3, carry 1.
Tens: 7 + 6 + 1 = 14 — write 4, carry 1.
Hundreds: the carried 1 — write 1.

78 + 65 = 143

Second check: 143 − 78 = 65

Similar examples to practise

Related Calculations

143 − 65 = 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 65

Example	Sum
65 + 65	130
67 + 65	132
69 + 65	134
71 + 65	136
74 + 65	139
76 + 65	141
78 + 65	143
83 + 65	148
85 + 65	150
89 + 65	154
92 + 65	157
94 + 65	159
98 + 65	163
105 + 65	170
136 + 65	201
172 + 65	237
203 + 65	268
239 + 65	304
268 + 65	333
307 + 65	372

FAQ

What is 78 + 65?

78 + 65 = 143

How do you check that 78 + 65 = 143?

Subtract one addend from the sum: 143 − 65 = 78, and 143 − 78 = 65. Getting the other addend back means the sum is right.

How many carries are there in 78 + 65?

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 65 + 78 the same as 78 + 65?

Yes. Addition is commutative, so both give 143; the column looks the same with either number on top.

See Also