"There are three easy ways to work on Office files on your Chromebook device. Using these three tips, you will be able to open and edit your Office files and also share them with others and start collaboratively editing them in real time. For these tips to work you need to make sure your Chromebook software is up to date and that you have the newest version of Google Drive.
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"Quickoffice available for free, for everyone. With Quickoffice, you can edit Microsoft® Office documents across your devices, giving you the freedom to work with anyone no matter what hardware or software they're using."