1325 - 415 - 325 - 3 85

=1325 - 325 - 415 - 385

= 1000 - 415 - 385

= 585 - 385

= 200

5/2 + 3/4 - 3/2 - 1/4

=( 5/2 - 3/2) + (3/4 - 1/4)

= 2/2 + 2/4

= 2/2+ 1/2 

= 3/2 

5/16 - 7/13 + 27/16 - 6/13

= 5/16 + 27/16 - 7/13 - 6/13

= 32/16 -13/13

= 2 - 1

= 1

10,25 + 8,52 - 3,25 + 1,48

= 18,77 - 3,25 + 1,48

= 15,52 + 1,48

= 17