решите пж 5,3+3 21/50- 2,9

5,3+3 21/50- 2,9 = 5 3/10 + 3 21/50 - 2 9/10 = 5 15/50 + 3 21/50 - 2 45/50 = 265+ 171 - 145/50 =  291/50 = 5 41/50