How far is the Shanghai Jewish museum from the crown plaza hotel?

You mean the Crowne Plaza Century Park at No.1433 Minsheng Road, Pudong New Area?

If so, there is about 7km. From the hotel, you can walk to the Yanggao Middle Road Station to take metro line 9 to reach Century Avenue Station, where you can change to line 4 to reach Dalian Road Station. Get out of the station from Exit 6 and walk about 5 minutes to reach the museum.