Addition with Regrouping: 203 + 17

Addition with Regrouping Calculator
First addend
Second addend

What is 203 + 17?

Answer

203 + 17 =
220

With regrouping: 1 carry — into the tens

203 + 17 in a column. Carries are the small circled digits above the columns.
1carry
2 0 3
+17
220

Column by column: 203 + 17

  • Ones: 3 + 7 = 10 — write 0, carry 1.
  • Tens: 0 + 1 + 1 = 2 — write 2.
  • Hundreds: nothing to add — write 2.

203 + 17 = 220

Second check: 220 − 203 = 17

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Column additions with 17

ExampleSum
83 + 17100
85 + 17102
89 + 17106
92 + 17109
94 + 17111
98 + 17115
105 + 17122
136 + 17153
172 + 17189
183 + 17200
203 + 17220
239 + 17256
268 + 17285
283 + 17300
307 + 17324
348 + 17365
376 + 17393
402 + 17419
453 + 17470
485 + 17502

FAQ

What is 203 + 17?

203 + 17 = 220

How do you check that 203 + 17 = 220?

Subtract one addend from the sum: 220 − 17 = 203, and 220 − 203 = 17. Getting the other addend back means the sum is right.

How many carries are there in 203 + 17?

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 17 + 203 the same as 203 + 17?

Yes. Addition is commutative, so both give 220; the column looks the same with either number on top.

See Also