8) We have two numbers, A and B, in the number line and we have to find where are located the results of some operations with A and B.
We don't know the values of A and B but we know that: A and B are positives numbers (they are located to the rigth of 0) and B is greater than A (B is to the right of A).
Then, we have to locate the following results:
8. B+A
We can draw them as:
In this case, we add the length of A from the position of B to the right to find B+A.
10. A-B
As B is greater than A we know that the result will be to the left of 0.
We also can write this expression as an addition like:
Now we can add the segments A and (-B).