Question

How do you simplify 3.4 + 6.0005 ?

Answer 1

align the decimal points and add as normal to get
`9.4005` (see note below)

Explanation:

#{: ("",3,".",4,,, ), ("+",6,".",0,0,0,5), ("=",9,".",4,0,0,5) :}#

Note : this assumes that `3.4` can be taken to be accurate to 5 decimal places. If it is only accurate to 2 places (i.e. it is in the range `[3.35,3.45)`) then the best answer would be `9.4`

Accuracy of a solution is limited to the accuracy of the least accurate value used to compute the solution.