1. In order from biggest to smallest is the square root of 25, square root of 2, 5/10, and then -2.5.
2. i used Square Root to find the answer to the square root of 25, which is 5, i divided 5 by 10 to find 5/10, which is 0.5, i did the square root of 2, which is 1.41.
3. to find the difference take 5 - (-2.5). Since it is minus a negative number, it cancels out, so 5 + 2.5 = 7.5