Addition with Regrouping: 402 + 149

Addition with Regrouping Calculator
First addend
Second addend

What is 402 + 149?

Answer

402 + 149 =
551

With regrouping: 1 carry — into the tens

402 + 149 in a column. Carries are the small circled digits above the columns.
1carry
4 0 2
+149
551

Column by column: 402 + 149

  • Ones: 2 + 9 = 11 — write 1, carry 1.
  • Tens: 0 + 4 + 1 = 5 — write 5.
  • Hundreds: 4 + 1 = 5 — write 5.

402 + 149 = 551

Second check: 551 − 402 = 149

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FAQ

What is 402 + 149?

402 + 149 = 551

How do you check that 402 + 149 = 551?

Subtract one addend from the sum: 551 − 149 = 402, and 551 − 402 = 149. Getting the other addend back means the sum is right.

How many carries are there in 402 + 149?

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 149 + 402 the same as 402 + 149?

Yes. Addition is commutative, so both give 551; the column looks the same with either number on top.

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