Only if you think your drone is worth more than those free props you got with it. 
Jokes aside, yeah, you should replace them.
Kind of scary that you’d even need to ask about replacing the simplest and cheapest part of your drone!
If you’re asking, the answer is yes.
Every time someone asks this, the answer is yes.
Honestly, any damage to a DJI drone should be sent to them for repair. Don’t try to fix it yourself; they don’t recommend that.
Sky said:
Honestly, any damage to a DJI drone should be sent to them for repair. Don’t try to fix it yourself; they don’t recommend that.
I’ve done plenty of repairs with DJI parts. This is just prop damage, super quick to fix on your own. They even sell props as a regular replacement part.
Replace them ASAP. Damaged props can lead to sudden failure, causing your drone to lose control, which could be a safety hazard. Even small cracks or chips can mess with the drone’s stability and cause vibrations that disrupt its sensors. Better safe than sorry!