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ashleydenton4
2/5 + 3/4 You must find the common denominator, which is 20. 2*4 equals 8 and 5*4 equals 20, or 8/20. 3*5 equals 15 and 4*5 equals 20, or 15/20. Now you can add them together, 8/20+15/20=23/20 or 1 3/20. so she used 1 and 3 twentieths of a yard. 


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