Question

How do I round off? 12.456 + 15 + 23.45

Answer 1

If you mean how to round using significant figures, you would round to the nearest whole number.

Explanation:

When adding or subtracting using significant figures, the result is rounded to the number in the problem with the least number of decimal places.

`12.456+15+23.45=50.906`

`50.906` is rounded to `51` because the number `15` has no decimal places, it is a whole number, so the answer must be a whole number.