Ok first I would see if the statement is true
So it’s saying that Gwen says the sum of those two numbers is the same as the difference of those other two numbers…
So first you want to find the some of -1 3/4 and 2 1/2
Then you want to find the difference of 2 1/2
And 1 3/4
If they are the same then explain why they are the same
If they are not the same explain why they are not the same
Sorry this isn’t really the answer but I hope I can help you understand
