Addition with Regrouping: 172 + 39

Addition with Regrouping Calculator
First addend
Second addend

What is 172 + 39?

Answer

172 + 39 =
211

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

172 + 39 in a column. Carries are the small circled digits above the columns.
1carry1carry
1 7 2
+39
211

Column by column: 172 + 39

  • Ones: 2 + 9 = 11 — write 1, carry 1.
  • Tens: 7 + 3 + 1 = 11 — write 1, carry 1.
  • Hundreds: 1 + 1 = 2 — write 2.

172 + 39 = 211

Second check: 211 − 172 = 39

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76 + 39115
78 + 39117
83 + 39122
85 + 39124
89 + 39128
92 + 39131
94 + 39133
98 + 39137
105 + 39144
136 + 39175
172 + 39211
203 + 39242
239 + 39278
268 + 39307
307 + 39346
348 + 39387
361 + 39400
376 + 39415
402 + 39441
453 + 39492

FAQ

What is 172 + 39?

172 + 39 = 211

How do you check that 172 + 39 = 211?

Subtract one addend from the sum: 211 − 39 = 172, and 211 − 172 = 39. Getting the other addend back means the sum is right.

How many carries are there in 172 + 39?

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 39 + 172 the same as 172 + 39?

Yes. Addition is commutative, so both give 211; the column looks the same with either number on top.

See Also