4,61+(2,29)=
-3,08+1,69=
3/10+(-4/5)=
-1/20+1/30=
5/8+(-1)=
2 3/4+(-9 5/6)=

Спасибо

4,61+2,29=6,9-(3,08-1,69)=-1,393/10-4/5= 3/10 - 8/10 = -5/10 =-1/2-1/20+1/30= -(1/20-1/30)= -( 3/60 - 2/60 ) = -1/605/8-1= 5/8- 8/8= -3/82 3/4- 9 5/6 = - (9 5/6 - 2 3/4) = -( 9 10/12 - 2 9/12) = - 7 1/12