# How do you simplify 3.4 + 6.0005 ?

Sep 7, 2015

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 $\left[3.35 , 3.45\right)$) 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.