Choose from easy, normal, hard difficulties and try to solve the formulas as fast as possible! Your score depends on your speed! All you need to do is to assign plus or minus to the empty fields by tapping on them! Submit your score to see who is the best mathematician!
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Plus or minus?
<a href="http://www.freegamesmax.com/kids/plus-or-minus-2">Plus or minus?</a>
<a href="http://www.freegamesmax.com/kids/plus-or-minus-2" title="Plus or minus?"><img src="http://www.freegamesmax.com/games/images/Plus-or-minus-shajby.png" alt="Plus or minus?" width="100" height="100"></a>