Heh, 85 words is close enough. :)
I think you can send fewer tokens back though, using the rest as the "gas"? I have some ETH and realized that when I transferred X to the wallet, and then tried to transfer Y out, that I also needed to spend Z (a tiny fraction of Y) in order to "fuel" the transaction. So each time I send ETH, I have a little bit less total.
Bitcoin works similarly, but it seems to me that ETH has more of an expense. Haven't looked into it in great detail, though.