Answer :

To find the sum of 483 and 172, follow these simple steps:

1. Align the numbers vertically:

```
483
+ 172
```

2. Start adding from the rightmost column (the ones place):

- Add 3 (from 483) and 2 (from 172), which equals 5.

3. Move to the tens column:

- Add 8 (from 483) and 7 (from 172), which equals 15.
- Write down the 5 and carry over the 1 to the hundreds column.

4. Finally, move to the hundreds column:

- Add 4 (from 483), 1 (carried over), and 1 (from 172), which equals 6.

5. Combine the results from each column:

The final sum is 655.

So, 483 plus 172 equals 655.