(1/6+1/10+1/15):(3/5-1/3-1/4)

Question

(1/6+1/10+1/15):(3/5-1/3-1/4)

Answer 1

(1/6+1/10+1/15)÷(3/5-1/3-1/4)=20
1)1/6+1/10=5/30+3/30=8/30
2)8/30+1/15=8/30+2/30=10/30=1/3
3)3/5-1/3=9/15-5/15=4/15
4)4/15-1/4=16/60-15/60=1/60
5)1/3÷1/60=1/3×60/1=1×20=20