Addition with Regrouping: 85 + 17

Addition with Regrouping Calculator

What is 85 + 17?

Answer

85 + 17 =

102

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

85 + 17 in a column. Carries are the small circled digits above the columns.
		1carry	1carry
			8	5
	+		1	7
		1	0	2

Column by column: 85 + 17

Ones: 5 + 7 = 12 — write 2, carry 1.
Tens: 8 + 1 + 1 = 10 — write 0, carry 1.
Hundreds: the carried 1 — write 1.

85 + 17 = 102

Second check: 102 − 85 = 17

Similar examples to practise

Related Calculations

102 − 17 = 85 - 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 17

Example	Sum
58 + 17	75
63 + 17	80
65 + 17	82
67 + 17	84
69 + 17	86
71 + 17	88
74 + 17	91
76 + 17	93
78 + 17	95
83 + 17	100
85 + 17	102
89 + 17	106
92 + 17	109
94 + 17	111
98 + 17	115
105 + 17	122
136 + 17	153
172 + 17	189
183 + 17	200
203 + 17	220

FAQ

What is 85 + 17?

85 + 17 = 102

How do you check that 85 + 17 = 102?

Subtract one addend from the sum: 102 − 17 = 85, and 102 − 85 = 17. Getting the other addend back means the sum is right.

How many carries are there in 85 + 17?

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 17 + 85 the same as 85 + 17?

Yes. Addition is commutative, so both give 102; the column looks the same with either number on top.

See Also