'Help me out' and 'Help me'

Is there a meaning difference between 'Help me out' and 'Help me'?

Help me out with my questions.

Help me with my questions.

Can you help me out with my geometry? 

Would you help me out with a little bit of salt?

I think that the usage of 'with nouns' phrases is different between them in meaning. What do you experts think?

Thank you so much as always and have a good day.