Addition with Regrouping: 578 + 28

Addition with Regrouping Calculator
First addend
Second addend

What is 578 + 28?

Answer

578 + 28 =
606

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

578 + 28 in a column. Carries are the small circled digits above the columns.
1carry1carry
5 7 8
+28
606

Column by column: 578 + 28

  • Ones: 8 + 8 = 16 — write 6, carry 1.
  • Tens: 7 + 2 + 1 = 10 — write 0, carry 1.
  • Hundreds: 5 + 1 = 6 — write 6.

578 + 28 = 606

Second check: 606 − 578 = 28

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536 + 28564
572 + 28600
578 + 28606
647 + 28675

FAQ

What is 578 + 28?

578 + 28 = 606

How do you check that 578 + 28 = 606?

Subtract one addend from the sum: 606 − 28 = 578, and 606 − 578 = 28. Getting the other addend back means the sum is right.

How many carries are there in 578 + 28?

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 28 + 578 the same as 578 + 28?

Yes. Addition is commutative, so both give 606; the column looks the same with either number on top.

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