I prefer decimals with common denominators so I'm going to go ahead and convert them.
-1.25+.50 = -.75
-.75 is -3/4 aka "c" or the third option.
Since 1 1/4 = 1.25, and 1/2 = 0.5, the answer would be: -0.75, or 3/4. Why?
First, we convert 1/2 into 2/4.
Then we subtract: 2/4-5/4, which gives us -3/4
And that is the answer.
Hope this helped! c:
