75/8 +4 2/3-8 3/16; 9 23/25-4 7/10-2 1/5; 20-(3 1/6+2 3/4); 1 5/6+(3-1 7/10)- выполнить действия

7 5/8+ 4 2/3-8 3/16=4 5/48
1)7 5/8+4 2/3=7 15/24+4 16/24=
=11 31/24=12 7/24
2)12 7/24-8 3/16=12 14/48-8 9/48=
=4 5/48

9 23/25-4 7/10-2 1/5=3 1/50 либо 3.02
=9 46/50-4 35/50-2 1/5=
=5 11/50-2 1/5=5 11/50-2 10/50=
=3 1/50

20-(3 1/6+2 3/4)=20-(3 2/12+2 9/12)=
=20-5 11/12=19 12/12- 5 11/12=14 1/12

1 5/6+(3-1 7/10)=1 5/6+(2 10/10-1 7/10)=
=1 5/6+1 3/10=1 25/30+1 9/30=
=2 34/30=3 4/30=3 2/15