Determine the sum or difference? - 14+25

Think about it like it's on a number line:

-14 + 25

You can use the commutive property of addition, which is just a fancy way of saying to switch the numbers around. Now you have:

25 - 14

Which is much easier. Take the 1 away from the 2, and the 4 away from the 5, and you get:

-14 + 25 = 11

The answer would be 11