Column Addition: 203 + 15

Addition with Regrouping Calculator

What is 203 + 15?

Answer

203 + 15 =

218

No regrouping: each column is added on its own

203 + 15 in a column. No carries.
		2	0	3
	+		1	5
		2	1	8

Column by column: 203 + 15

Ones: 3 + 5 = 8 — write 8.
Tens: 0 + 1 = 1 — write 1.
Hundreds: nothing to add — write 2.

203 + 15 = 218

Second check: 218 − 203 = 15

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Related Calculations

218 − 15 = 203 - Column Subtraction

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 15

Example	Sum
78 + 15	93
83 + 15	98
85 + 15	100
89 + 15	104
92 + 15	107
94 + 15	109
98 + 15	113
105 + 15	120
136 + 15	151
172 + 15	187
203 + 15	218
239 + 15	254
268 + 15	283
307 + 15	322
348 + 15	363
376 + 15	391
402 + 15	417
453 + 15	468
485 + 15	500
536 + 15	551

FAQ

What is 203 + 15?

203 + 15 = 218

How do you check that 203 + 15 = 218?

Subtract one addend from the sum: 218 − 15 = 203, and 218 − 203 = 15. Getting the other addend back means the sum is right.

How many carries are there in 203 + 15?

None: no column adds up to 10 or more, so every digit of the sum is written straight away.

Is 15 + 203 the same as 203 + 15?

Yes. Addition is commutative, so both give 218; the column looks the same with either number on top.

See Also