Column Addition: 402 + 45

Addition with Regrouping Calculator

What is 402 + 45?

Answer

402 + 45 =

447

No regrouping: each column is added on its own

402 + 45 in a column. No carries.
		4	0	2
	+		4	5
		4	4	7

Column by column: 402 + 45

Ones: 2 + 5 = 7 — write 7.
Tens: 0 + 4 = 4 — write 4.
Hundreds: nothing to add — write 4.

402 + 45 = 447

Second check: 447 − 402 = 45

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Related Calculations

447 − 45 = 402 - 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 45

Example	Sum
85 + 45	130
89 + 45	134
92 + 45	137
94 + 45	139
98 + 45	143
105 + 45	150
136 + 45	181
172 + 45	217
203 + 45	248
239 + 45	284
268 + 45	313
307 + 45	352
348 + 45	393
376 + 45	421
402 + 45	447
453 + 45	498
485 + 45	530
536 + 45	581
578 + 45	623
647 + 45	692

FAQ

What is 402 + 45?

402 + 45 = 447

How do you check that 402 + 45 = 447?

Subtract one addend from the sum: 447 − 45 = 402, and 447 − 402 = 45. Getting the other addend back means the sum is right.

How many carries are there in 402 + 45?

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

Is 45 + 402 the same as 402 + 45?

Yes. Addition is commutative, so both give 447; the column looks the same with either number on top.