How do you add 9.23 and 0.071?

Answer 1

First write both numbers, one below the other so that the decimal points line up. If you like, add 0s to the right hand side so that both numbers are the same length after the decimal point. Add, as you would any numbers. In the answer, put the decimal point below the ones above.

So:

_9.230

+0.071

=====

_9.301

The underscores (_) in the front are simply to line up the numbers.