Column Addition: 45 + 34

Addition with Regrouping Calculator
First addend
Second addend

What is 45 + 34?

Answer

45 + 34 =
79

No regrouping: each column is added on its own

45 + 34 in a column. No carries.
4 5
+34
79

Column by column: 45 + 34

  • Ones: 5 + 4 = 9 — write 9.
  • Tens: 4 + 3 = 7 — write 7.

45 + 34 = 79

Second check: 79 − 45 = 34

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Column additions with 34

ExampleSum
34 + 3468
36 + 3470
39 + 3473
41 + 3475
45 + 3479
47 + 3481
52 + 3486
54 + 3488
58 + 3492
63 + 3497
65 + 3499
67 + 34101
69 + 34103
71 + 34105
74 + 34108
76 + 34110
78 + 34112
83 + 34117
85 + 34119
89 + 34123

FAQ

What is 45 + 34?

45 + 34 = 79

How do you check that 45 + 34 = 79?

Subtract one addend from the sum: 79 − 34 = 45, and 79 − 45 = 34. Getting the other addend back means the sum is right.

How many carries are there in 45 + 34?

None: no column adds up to 10 or more, so every digit of the sum is written straight away.

Is 34 + 45 the same as 45 + 34?

Yes. Addition is commutative, so both give 79; the column looks the same with either number on top.

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