Switching machines

I bought a MacBook in June this year and have recently got an iMac in addition. When I bought the MB, I bought iWork as well. As my printer is connected to my iMac, I want to use iWork on this instead, so that I can print my Pages documents. Because iWork is registered to my MB, am I correct in assuming I will not be able to use it on my iMac, or can I simply delete the prog. from my MB and reinstall/reregister on my iMac?