Question

Помогите пожалуйста

Answer 1

1)33:30 = 1,1
2)1,1-4/5 = 1 1/10-8/10 = 11/10-8/10 = 3/10
3)3/10×2 2/9 = 3/10×20/9 = 2/3
4)2/3+2/5 = 10/15+6/15 = 16/15 = 1 1/15