1) -9,25+(- 3 1/5)+0. 3 1/5= 3,2
-9,25-3,2=-12,55
2)-72+3 5/8 +(-0,75)= 0,75=3,4
-72+ 3 5/8 - 6/8=
-72 + 2 13/8 - 6/8=
-72 + 2 7/8=
-71 8/8 + 2 7/8= 69 1/8
3) 15 + (-9,46)+(-23/50)= 23/50= 0,46
15-9,46-0,46=6
4) -83,4 +(-19 2/3) +(- 4/15)= -83,4=- 83 1/4
- 83 1/4 - 19 10/15 - 4/15=
- 83 15/60 - 23 56/60=
-106 71/60 = -107 11/60