which number line correctly shows 4.5 - 2.5?

Answer:

To subtract on a number - line for (a - b), we start at (a) and move (b) units to the left. For (4.5-2.5), we start at (4.5) and move (2.5) units to the left.

We first find the result of (4.5 - 2.5=2).

We start at (4.5) on the number - line and move (2.5) units to the left and end up at (2).

Looking at the number - line options:

1. In the first option, we start at (0) and move to (4.5) and then some other incorrect movement.
2. In the second option, the starting and ending points and the direction of movement are incorrect as it starts from a negative number and has wrong intervals.
3. In the third option, we start at (4.5) and move (2.5) units to the left and end at (2), which is correct.
4. In the fourth option, the starting and ending points and the direction of movement are incorrect as it starts from a negative number and has wrong intervals.

The correct number - line is the one where we start at (4.5) and move (2.5) units to the left.

Explanation:

Step1: Calculate the subtraction

(4.5−2.5 = 2)

Step2: Analyze number - line movement

Start at (4.5), move 2.5 units left.