Addition with Regrouping: 9,988 + 12

Addition with Regrouping Calculator
First addend
Second addend

What is 9,988 + 12?

Answer

9,988 + 12 =
10,000

The sum is longer than the addends: 4 carries — into every column from the tens to the ten thousands; the last one makes a new digit

9,988 + 12 in a column. Carries are the small circled digits above the columns.
1carry1carry1carry1carry
9 9 8 8
+12
10000

Column by column: 9,988 + 12

  • Ones: 8 + 2 = 10 — write 0, carry 1.
  • Tens: 8 + 1 + 1 = 10 — write 0, carry 1.
  • Hundreds: 9 + 1 = 10 — write 0, carry 1.
  • Thousands: 9 + 1 = 10 — write 0, carry 1.
  • Ten thousands: the carried 1 — write 1.

9,988 + 12 = 10,000

Second check: 10,000 − 9,988 = 12

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Column additions with 12

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

FAQ

What is 9,988 + 12?

9,988 + 12 = 10,000

How do you check that 9,988 + 12 = 10,000?

Subtract one addend from the sum: 10,000 − 12 = 9,988, and 10,000 − 9,988 = 12. Getting the other addend back means the sum is right.

How many carries are there in 9,988 + 12?

4 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 + 9,988 the same as 9,988 + 12?

Yes. Addition is commutative, so both give 10,000; the column looks the same with either number on top.

See Also