вычислите (6 12/15-2 8/10) + (3 5/15+8/14/20

(102/15-28/10)+(50/15+174/20)=(204/30-84/30)+(200/60+522/60)=120/30+722/60=240/60+722/60=962/60=16 1/30

( 6 12/15 -2 8/10) + (3 5/15 + 8  14/20) = 16 1/301) 6 12/15 - 2 8/10 = 102/15 - 28/10 = 34/5 -14/5= 20/5 =42) 3 5/15 + 8 14/20  = 50/15 +174/20 = (200+522) /60 = 722/60= 361/30 = 12 1/303) 4+ 12 1/30 = 16 1/30