(1/15+10/30):2+(4/40-2/20)×2

Question

(1/15+10/30):2+(4/40-2/20)×2

Answer 1

(1/15 + 10/30) : 2 + (4/40-2/20) * 2 = (2/30 + 10/30) : 2 + (4/40-4/40) * 2 = 12/30 : 2/1 + 0 * 2 = 12/30 * 1/2 = 6/30 = 1/5