About Sims 3 expansions cds and origin/steam?

If i own one of the old sims 3 expansion cds could i link it to my steam or origin accounts im asking this because if i can id rather buy the expansion this way instead of having to pay the $100 for the couple dlc i want from steam or origin stores since i own the base game from them but i dont have any dlc could this work or would i be wasting money

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