Addition with Regrouping: 688 + 12

Addition with Regrouping Calculator
First addend
Second addend

What is 688 + 12?

Answer

688 + 12 =
700

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

688 + 12 in a column. Carries are the small circled digits above the columns.
1carry1carry
6 8 8
+12
700

Column by column: 688 + 12

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

688 + 12 = 700

Second check: 700 − 688 = 12

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Recalculate with different values ↑

Column additions with 12

ExampleSum
288 + 12300
307 + 12319
348 + 12360
376 + 12388
388 + 12400
402 + 12414
453 + 12465
485 + 12497
488 + 12500
536 + 12548
578 + 12590
588 + 12600
647 + 12659
688 + 12700
788 + 12800
888 + 12900
988 + 121,000
1,988 + 122,000
4,988 + 125,000
9,988 + 1210,000

FAQ

What is 688 + 12?

688 + 12 = 700

How do you check that 688 + 12 = 700?

Subtract one addend from the sum: 700 − 12 = 688, and 700 − 688 = 12. Getting the other addend back means the sum is right.

How many carries are there in 688 + 12?

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 12 + 688 the same as 688 + 12?

Yes. Addition is commutative, so both give 700; the column looks the same with either number on top.

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