Can someone help me with this?

1) .

2)  

3)  

4)  

5)  

6)  

7)  

8)  

Step-by-step explanation:

In the given number lines, rightarrows represent positive integers and leftarrows represent negative integers.

1)

In first number line we have two rightarrows.

Rightarrow from 0-4 = 4

Rightarrow from 4-9 = 5

So, required sum is .

Similarly,

2)

3)

4)

5)

6)

7)

8)