1) 3/20+3/4+5/12=(9+45+25)/60=79/60=1¹⁹/₆₀=1,317
2) 17/18+5/9=(17+10)/18=27/18. 11/12+8/9=(33+32)/36=65/36. 27/18+65/36=(54+65)/36=3¹¹/₃₆
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1) 3/20+3/4+5/12=(9+45+25)/60=79/60=1¹⁹/₆₀=1,317
2) 17/18+5/9=(17+10)/18=27/18. 11/12+8/9=(33+32)/36=65/36. 27/18+65/36=(54+65)/36=3¹¹/₃₆