Now its has been very easy to embed a doc, presentation, or some nifty calculations in a spreadsheet or made a fillable form on Google Docs. Using Google Docs Shortcode plugin you can embed Google Doc inside your blog post.
Install and activate Google Docs Shortcode. The plugin simply allows you to enter in the Google Docs shortcode into your blog post and presto, the doc should embed into your blog post. Follow this link to know the shortcode usage of the plugin.