(2,25-5,25)+(2/9 - 5/18)

Question

(2,25-5,25)+(2/9 - 5/18)

Answer 1

2.25=2 1/4=9/4
5,25=5 1/4=21/4
9/4-21/4= -12/4= -3

2/9-5/18=4/18-5/18= -1/18

-3+(-1/18)= -3-1/18= -3 1/18