How do I know what goes on the top number line and on the bottom number line? Please explain this
I don't want the answer but how you get the answer and what number goes on the top and bottom of the 2 number lines, and how do you know what number goes there (on the number line).

9514 1404 393

  get a clue from the problem statement, figure out what you need to help you solve the problem

Step-by-step explanation:

You need to read and understand the entire problem. Different parts of it give you different clues as to how to arrive at appropriate number lines.

Here are some of them:

The double number line is a tool, just as any diagram is a tool to help you solve a problem. You choose the way you draw it so that it is of help to you in answering the questions asked.

beanburito

step-by-step explanation:

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.