(\/3 1/5 + \/1 1/4):5/\/180=

=(\/16/\/5 + \/5/\/4)×(\/180)/5=

=(4/\/5 + \/5 /2) × 6\/5 /5=

=(24\/5)/5\/5 + (6×5)/10=

=24/5 + 15/5 = 39/5 = 7 4/5

(\/4 1/6 + \/1 1/2):\/150 /3=

(\/25/\/6 + \/3/\/2)×3/\/150=

(5/(\/2\/3) + \/3/\/2)×3/(5\/2\/3)=

15/(5×6) + 3\/3/(5×2\/3=

1/2+3/10=4/5