Final answer:
The sum of -2.5 and 5 1/10 in decimal form is 2.6.
Step-by-step explanation:
The question asks for the sum of -2.5 and 5 1/10 in decimal form. First, we must convert the mixed number 5 1/10 into a decimal, which is 5.1. Next, we add the decimal numbers together. The operation looks like this:
-2.5 + 5.1 = 2.6
Therefore, the sum of -2.5 and 5 1/10 in decimal form is 2.6.