Free Download Microsoft Math 1.0.2.0 XAP for Windows Phone
Free Education App by Microsoft Corporation

You are downloading the Microsoft Math XAP file v1.0.2.0 for Windows Phone. Microsoft Math is a free and useful Education app: Microsoft Math makes the learning experience personal, engaging and exciting. Students can do math exercises, read theory, learn from examples, and ... You can now download the offline XAP file to install & try it.
Download Locations for Microsoft Math 1.0.2.0 XAP file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Microsoft Math XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.