Explanation:
The scientific notation:

where
and k is integer.
We have the example:

You can write the numbers in a "normal" form:

Make the sum:

And next write it in the scientific notation:

<h3>Other method:</h3>
You can add numbers in scientific notation if the power of tens in both number is the same.
Therefore you must convert the first number:

Now, you can make the sum:

There are 7 signifigant figures in this number!
Yes I think he is what’s ur snap?
60 minutes in an hour so. 60 times 10=600+10 more minutes
He burns 610 kilocalories
Then 610 / 4.06
150.25