Addition with Regrouping: 578 + 67

Addition with Regrouping Calculator
First addend
Second addend

What is 578 + 67?

Answer

578 + 67 =
645

With regrouping: 2 carries — into the tens and the hundreds

578 + 67 in a column. Carries are the small circled digits above the columns.
1carry1carry
5 7 8
+67
645

Column by column: 578 + 67

  • Ones: 8 + 7 = 15 — write 5, carry 1.
  • Tens: 7 + 6 + 1 = 14 — write 4, carry 1.
  • Hundreds: 5 + 1 = 6 — write 6.

578 + 67 = 645

Second check: 645 − 578 = 67

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Column additions with 67

ExampleSum
105 + 67172
133 + 67200
136 + 67203
172 + 67239
203 + 67270
233 + 67300
239 + 67306
268 + 67335
307 + 67374
333 + 67400
348 + 67415
376 + 67443
402 + 67469
433 + 67500
453 + 67520
485 + 67552
533 + 67600
536 + 67603
578 + 67645
647 + 67714

FAQ

What is 578 + 67?

578 + 67 = 645

How do you check that 578 + 67 = 645?

Subtract one addend from the sum: 645 − 67 = 578, and 645 − 578 = 67. Getting the other addend back means the sum is right.

How many carries are there in 578 + 67?

2 carries: 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 67 + 578 the same as 578 + 67?

Yes. Addition is commutative, so both give 645; the column looks the same with either number on top.

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