Column Addition: 427 + 402

Addition with Regrouping Calculator

What is 427 + 402?

Answer

427 + 402 =

829

No regrouping: each column is added on its own

427 + 402 in a column. No carries.
		4	2	7
	+	4	0	2
		8	2	9

Column by column: 427 + 402

Ones: 7 + 2 = 9 — write 9.
Tens: 2 + 0 = 2 — write 2.
Hundreds: 4 + 4 = 8 — write 8.

427 + 402 = 829

Second check: 829 − 427 = 402

Similar examples to practise

Related Calculations

829 − 402 = 427 - 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 402

Example	Sum
402 + 402	804
427 + 402	829
453 + 402	855
468 + 402	870
485 + 402	887
498 + 402	900
519 + 402	921
536 + 402	938
564 + 402	966
578 + 402	980
598 + 402	1,000
602 + 402	1,004
647 + 402	1,049
683 + 402	1,085
1,598 + 402	2,000
4,598 + 402	5,000
9,598 + 402	10,000

FAQ

What is 427 + 402?

427 + 402 = 829

How do you check that 427 + 402 = 829?

Subtract one addend from the sum: 829 − 402 = 427, and 829 − 427 = 402. Getting the other addend back means the sum is right.

How many carries are there in 427 + 402?

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

Is 402 + 427 the same as 427 + 402?

Yes. Addition is commutative, so both give 829; the column looks the same with either number on top.

See Also