Question

281. 1) 9/20 + 3/10 + 1/5 11/25 + 13/50 + 14/75 3) 4/15 + 7/30 + 19/75
помогите ​

Answer 1

Пошаговое объяснение:

1) 9/20 + 3/10 + 1/5 =

(9+3•2+1•4)/20=19/20

2)11/25 + 13/50 + 14/75 = (11•6+13•3+14•2)/150=133/150

3) 4/15 + 7/30 + 19/75 = (4•10+7•5+19•2)/150= 113/150