
Math Help  Add Fractions  Unreduced Answers  Game 1b Tips:  In order to add two fractions, you convert them to the same denominator (common denominator).  You can convert a fraction by multiplying the top and bottom by the same number.  This is equivalent to multiplying by a one = 1/1 , which keeps the value of the fraction unchanged.  The fraction 2/3 can be added to 1/4 by first converting 2/3 into 8/12 and converting 1/4 into 3/12. Then you add (8/12 + 3/12) to get the answer 11/12 . Notice, 2/3 was converted by multiplying the top and bottom by 4 , giving (2x4)/(3x4) = 8/12. Also, 1/4 was converted by multiplying the top and bottom by 3 , giving (1x3)/(4x3) = 3/12.  Another example: 1/4 + 5/6 = (1x6)/(4x6) + (4x5)/(4x6) = 6/24 + 20/24 = 26/24 [unreduced].  The general rule is a/b + c/d = (ad)/(bd) + (bc)/(bd) = (ad+bc)/(bd) .  The denominators used in this game are 2, 3, 4, 6, 7 and their multiples (up to 5x).  It may take a minute to load the game at dialup speeds.  The game can be played using the mouse by itself or using the keyboard by itself.  If the game doesn't respond to keyboard input, click inside the game area to reset the game's focus.  Adjust the game's speed by pressing the + or  key repeatedly. 
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