Addition with Regrouping: 402 + 78

Addition with Regrouping Calculator

What is 402 + 78?

Answer

402 + 78 =

480

With regrouping: 1 carry — into the tens

402 + 78 in a column. Carries are the small circled digits above the columns.
			1carry
		4	0	2
	+		7	8
		4	8	0

Column by column: 402 + 78

Ones: 2 + 8 = 10 — write 0, carry 1.
Tens: 0 + 7 + 1 = 8 — write 8.
Hundreds: nothing to add — write 4.

402 + 78 = 480

Second check: 480 − 402 = 78

Similar examples to practise

Related Calculations

480 − 78 = 402 - 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 78

Example	Sum
85 + 78	163
89 + 78	167
92 + 78	170
94 + 78	172
98 + 78	176
105 + 78	183
136 + 78	214
172 + 78	250
203 + 78	281
239 + 78	317
268 + 78	346
307 + 78	385
348 + 78	426
376 + 78	454
402 + 78	480
453 + 78	531
485 + 78	563
536 + 78	614
578 + 78	656
647 + 78	725

FAQ

What is 402 + 78?

402 + 78 = 480

How do you check that 402 + 78 = 480?

Subtract one addend from the sum: 480 − 78 = 402, and 480 − 402 = 78. Getting the other addend back means the sum is right.

How many carries are there in 402 + 78?

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.

Is 78 + 402 the same as 402 + 78?

Yes. Addition is commutative, so both give 480; the column looks the same with either number on top.