Вычислите 1) (4 5/12-3 7/18): 9,25+5/6 (0,4+1/8+0,75)*2/3 2) 3 7/15*0,25+5/6-1 2/5 5,4: (3/20+0,75)

1) (45/12-37/18) : 9.25+5/6=(15/4- 37/ 18) : 37/4+5/6 = (  (15·9-37·2 )/36 ) : ((37 /4)+ 5 /6 = ((135- 74))/ 36) ·(4\37)+5/6 = (61/36 ) ·4/37 +5/6 = (61 ·4) / (9·37)+5/6 = (61 / (9·37)+5/6= 61/333_+5 / 6= (61·6+333·5)/333·6 = (366+1665) / 1998 =2031 / 1998 = 677/666