Using Calc/ Using my Keypad “Enter” Key instead of “Return” on the regular keyboard

I’m very used to using my “enter” key on a numeric keypad keyboard to enter formulas. For instance: Cell A1 has “2” plus cell A2 has “2” . Then going to cel A3, I press = then click A2 and A1 then *Enter*. (I use my *“enter”* key rather than using the *"return* key on the regular keyboard). Unfortunately this always gives me the cell value of A2 rather than the expected value of 4. Even if I use the sum formula and hit the *enter key* it still results in the same thing. Is there a remedy for this, perhaps a substitute macro key, hence my question below:

“Is there a way to substitute my numeric keypad *Enter* key for the regular keyboard *Return* key?”

I have always used this key when using Excel, and I wish to move away from Excel by using LibreOffice Calc. Being a novice at this application, perhaps I’m asking some very basic questions here, but I don’t see this question in your FAQ. I’m using an iMac, OS X 10.8. Thank you for your help!

pdw