Are these sentences below correct?
1. Share me your food
2. Share your food with me
3. Come up on stage to give a speech
4. After you give a speech, go down the stage to take photos with audience.
5. When you line up at a hospital to wait for your turn to see a doctor, you are given a piece of paper that has a number in it. Is it correct to ask somebody that: What number are you? What is your order number? I got number 20

Question

Are these sentences below correct?
1. Share me your food
2. Share your food with me
3. Come up on stage to give a speech
4. After you give a speech, go down the stage to take photos with audience. 
5. When you line up at a hospital to wait for your turn to see a doctor, you are given a piece of paper that has a number in it. Is it correct to ask somebody that: What number are you? What is your order number? I got number 20

Answer

1. Share with me your food.
2. Share your food with me.
3. Come up on stage to give a speech.
4. After you give a speech, go down off the stage to take photos with the audience.
5. When you line up at a hospital to wait for your turn to see a doctor, you are given a piece of paper that has a number on it. Is it correct to ask somebody that: What number are you? What is your order number? I have number 20.

I made a few minor changes. For the last one, the most common question is "What number are you?"

Answer

Jonathan's correction to 1 made it better, but it is still not very natural. Use 2 instead.