Epsilon-pi is at it again. She stole the symbols from the equations.

There were arithmetic signs in these sums, but she took them all except the =. Now she has new ones, but she has no idea how to put them back.

Can you help her?

Here are the symbols you may use:

Which equations can you fix for her? 

Which ones are hard?  Did they get easier as you went? 

Please explain how your brain went about finding the operations and inserting the symbols.

 

Plenty more ...

Which equations can you complete? 
Were some more difficult than others? Why?