order from least to greatest

- 1/3
0.3
-0.35
-3/10
i got:
0.35
-1/3
-3/10
0.3

#8)
1/5
-0.25
0.21
3/10
i got:
-0.25
1/5
0.21
3/10

9)
-9/11
-0.55
-3/4
-12/25
i got:
-9/11
-3/4
-0.55
-12/25

#10)
-9/10
-0.55
-3/4
-12/25

i got;
-9/10
-3/4
-0.55
-12/25

are these correct?

Except for #7 (first one), the rest are all correct.

For #7, you simply omitted the negative sign of -0.35. With the sign placed correctly, you'd be OK.