Addition with Regrouping: 647 + 74

Addition with Regrouping Calculator
First addend
Second addend

What is 647 + 74?

Answer

647 + 74 =
721

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

647 + 74 in a column. Carries are the small circled digits above the columns.
1carry1carry
6 4 7
+74
721

Column by column: 647 + 74

  • Ones: 7 + 4 = 11 — write 1, carry 1.
  • Tens: 4 + 7 + 1 = 12 — write 2, carry 1.
  • Hundreds: 6 + 1 = 7 — write 7.

647 + 74 = 721

Second check: 721 − 647 = 74

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Column additions with 74

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94 + 74168
98 + 74172
105 + 74179
136 + 74210
172 + 74246
203 + 74277
239 + 74313
268 + 74342
307 + 74381
326 + 74400
348 + 74422
376 + 74450
402 + 74476
426 + 74500
453 + 74527
485 + 74559
526 + 74600
536 + 74610
578 + 74652
647 + 74721

FAQ

What is 647 + 74?

647 + 74 = 721

How do you check that 647 + 74 = 721?

Subtract one addend from the sum: 721 − 74 = 647, and 721 − 647 = 74. Getting the other addend back means the sum is right.

How many carries are there in 647 + 74?

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 74 + 647 the same as 647 + 74?

Yes. Addition is commutative, so both give 721; the column looks the same with either number on top.

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