Question

Which expression is represented by the number line?

A number line going from negative 4 to positive 4. An arrow goes from negative 2.5 to negative 1, from 0 to 3, and from 3 to negative 2.5.
3 – 5.5 – 1.5
3 – 5.5 + 1.5
3 – 2.5 – 1
3 – 2.5 + 1

Answer 1

Each arrow is a displacement: -2.5 → -1 is +1.5, 0 → 3 is +3, and 3 → -2.5 is -5.5.
So the total is 3 + (-5.5) + 1.5, i.e. 3 – 5.5 + 1.5. (Option 2)