Addition with Regrouping: 128 + 128

Addition with Regrouping Calculator

What is 128 + 128?

Answer

128 + 128 =

256

With regrouping: 1 carry — into the tens

128 + 128 in a column. Carries are the small circled digits above the columns.
			1carry
		1	2	8
	+	1	2	8
		2	5	6

Column by column: 128 + 128

Ones: 8 + 8 = 16 — write 6, carry 1.
Tens: 2 + 2 + 1 = 5 — write 5.
Hundreds: 1 + 1 = 2 — write 2.

128 + 128 = 256

Similar examples to practise

Related Calculations

256 − 128 = 128 - 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 128

Example	Sum
128 + 128	256
136 + 128	264
149 + 128	277
172 + 128	300
187 + 128	315
203 + 128	331
214 + 128	342
239 + 128	367
256 + 128	384
268 + 128	396
291 + 128	419
307 + 128	435
325 + 128	453
348 + 128	476
354 + 128	482
376 + 128	504
389 + 128	517
402 + 128	530
427 + 128	555
453 + 128	581

FAQ

What is 128 + 128?

128 + 128 = 256

How do you check that 128 + 128 = 256?

Subtract one addend from the sum: 256 − 128 = 128. Getting the other addend back means the sum is right.

How many carries are there in 128 + 128?

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.

See Also