Как решить : ( 3 7/30 - 1 5/12 ) : 18 1/16
1) 3 7/30 - 1 5/12 = 97/30 - 17/12 = (97 × 2 - 17 × 5)/60 = 194/60 - 85/60 = 109/60 = 1 49/60 2)1 49/60 ÷ 18 1/16 = 109/60 ÷ 289/16 = 109/60 × 16/289 = 436/4335 ответ : 436/4335