Addition with Regrouping: 85 + 85

Addition with Regrouping Calculator

What is 85 + 85?

Answer

85 + 85 =

170

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

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

Column by column: 85 + 85

Ones: 5 + 5 = 10 — write 0, carry 1.
Tens: 8 + 8 + 1 = 17 — write 7, carry 1.
Hundreds: the carried 1 — write 1.

85 + 85 = 170

Similar examples to practise

Related Calculations

170 − 85 = 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 85

Example	Sum
85 + 85	170
89 + 85	174
92 + 85	177
94 + 85	179
98 + 85	183
105 + 85	190
136 + 85	221
172 + 85	257
203 + 85	288
239 + 85	324
268 + 85	353
307 + 85	392
348 + 85	433
376 + 85	461
402 + 85	487
453 + 85	538
485 + 85	570
536 + 85	621
578 + 85	663
647 + 85	732

FAQ

What is 85 + 85?

85 + 85 = 170

How do you check that 85 + 85 = 170?

Subtract one addend from the sum: 170 − 85 = 85. Getting the other addend back means the sum is right.

How many carries are there in 85 + 85?

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.

See Also