It can be, but only when it means approximate, which can be either an adjective or a verb. Approximated is the past tense and past participle of the verb approximate (to estimate, to judge).
9.58 approximated to the nearest tenths is 9.6
When was pi first being used approximated?
It is still 19.
Yes it can.
6.7
Approximability is the state of being approximable - able to be approximated.
It is already at its closest, so it is 270.
Estimations
7.9
4.7
It is about 4.4
: Find the percentage error if 625.483 is approximated to 3 significant digits?