Is it possible to *partially* claim an iTunes gift card?

When I claim an iTunes gift card I am given the option to use it toward an Apple Music subscription. For example, I can use a $150 gift card to get a year of Apple Music for $99 and have $51 left over to buy apps or whatever. But what if I'm not sure yet whether or not I want to commit to the Apple Music Platform? It may not be an obvious decision for everyone. It certainly gave me a pause, while I considered how likely I am to purchase a HomePod in the near future, and various other factors. Is there a way to claim *just* $51 of the $150 gift card and buy some apps and music while I contemplate whether I actually want Apple Music? Or do I have to buy the Apple Music subscription first, *and then* other iTunes content?