What number is halfway between 3.25 and –2.75 on a number line?

The number halfway between two numbers can be found by taking the average of those two numbers.

In this case, the two numbers are 3.25 and -2.75.

To find the average, add the two numbers together and divide by 2:

(3.25 + (-2.75)) / 2 = 0.5 / 2 = 0.25

Therefore, the number halfway between 3.25 and -2.75 on a number line is 0.25.