(4/27+5/36)÷5/9=(4/27+5/36)x9/5=4/27x9/5+5/36x9/5=4/15+1/4=16/60+15/60=31/60谢谢,请采纳
(4/27+5/36)÷(5/9)=9X(4/27)÷5+9X(5/36)÷5=4/15+1/4=16/60+15/60=31/60
(4/27+5/36)/(5/9)=(4/27+5/36)*9/5=4/27*9/5+5/36*9/5=4/15+1/4=16/60+15/6031/60