Answer:

Step-by-step explanation:
Given
See attachment for number line
Required
Determine the model
From the attachment, we can see that each partition is 1/3
The gray rectangle covers 11 partitions.
So:


Express as a mixed number

The black rectangle covers 8 partitions
So:


Express as a mixed number

So, the model is:

Where Total is the point where the black rectangle stops

Answer:
165
Step-by-step explanation:
-21+186=165 .....
17. 9
18. 12
19. 16
20. 56
21. 143
22. 14
23. 27
24. 7