Noun form of verbs

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Across
  1. 3. it is really wonderful to see the _______(fly) of an eagle in the sky
  2. 4. I want to know the types of ____________(calculate)
  3. 6. in maths I like ______________(add)
  4. 7. before speaking on a topic we must have _______(clear})
  5. 9. before teaching a subject ____________(explore) of a text book is important.
Down
  1. 1. George Bernard Shaw says _________(imitate) is suicide.
  2. 2. for every work we need a plan of _________ (act)
  3. 5. we do many thing in our ___________(live) for comfortable living.
  4. 6. I need an ______(act) on division to teach students effectively.
  5. 8. riddles, puzzle activities are _________ (feed) for brain