Question

пооооомммооггиитттее

Answer 1

(15/4:30/7 - 1/9):4/5-9/4= -1 85/288
1) 15/4:30/7= 15/4* 7/30= 7/8
2) 7/8-1/9= 63/72 -8/72= 55/72
3) 55/72:4/5= 55/72* 5/4 = 275/288
4) 275/288 -9/4= 275/288 - 648/288= -373/288= - 1 85/288

Answer 2

(15/4:30/7-1/9)*5/9-9/4=(15/4*7/30-1/9)*5/4-9/4=(1/4*7/2-1/9)*5/4-9/4=(7/8-1/9)*5/4-9/4=55/72*5/4-9/4=55/72*5/4-9/4=275/288-9/4=-1 85/288