An eye doctor tracks the prescriptions of six patients. They are as follows: - 2.5, + 0.25, - 1.25, - 1.5, + 1.25, + 0.5. What is the total strength of prescriptions for those six patients?

Answer: negative - 3.25

Step-by-step explanation: Add the negatives which is - 5.25 then the positives which is positive 2.00

Then you need to add 2 to the negative number and you'll get - 3.25

-3.25 add all like terms first