Cerebrum is the main thinking part of the brain therefore performs functions like reasoning,learning,intelligence etc. Whereas cerebellum helps in maintaining the body posture and helps us to make precise and accurate movements such as writing,dancing,picking up a pen etc.
The cerebellum receives information from the sensory systems, the spinal cord, and other parts of the brain and then regulates motor movements. The cerebellum coordinates voluntary movements such as posture, balance, coordination, and speech, resulting in smooth and balanced muscular activity.