Addition with Regrouping: 105 + 67

Addition with Regrouping Calculator
First addend
Second addend

What is 105 + 67?

Answer

105 + 67 =
172

With regrouping: 1 carry — into the tens

105 + 67 in a column. Carries are the small circled digits above the columns.
1carry
1 0 5
+67
172

Column by column: 105 + 67

  • Ones: 5 + 7 = 12 — write 2, carry 1.
  • Tens: 0 + 6 + 1 = 7 — write 7.
  • Hundreds: nothing to add — write 1.

105 + 67 = 172

Second check: 172 − 105 = 67

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71 + 67138
74 + 67141
76 + 67143
78 + 67145
83 + 67150
85 + 67152
89 + 67156
92 + 67159
94 + 67161
98 + 67165
105 + 67172
133 + 67200
136 + 67203
172 + 67239
203 + 67270
233 + 67300
239 + 67306
268 + 67335
307 + 67374
333 + 67400

FAQ

What is 105 + 67?

105 + 67 = 172

How do you check that 105 + 67 = 172?

Subtract one addend from the sum: 172 − 67 = 105, and 172 − 105 = 67. Getting the other addend back means the sum is right.

How many carries are there in 105 + 67?

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 67 + 105 the same as 105 + 67?

Yes. Addition is commutative, so both give 172; the column looks the same with either number on top.

See Also