For, to, and so that

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Across
  1. 4. You use this to do mathematical calculations
  2. 5. Is necessary to enter or travel to USA
  3. 6. Used to clean your teeth
  4. 7. You use this to carry your books to school
  5. 9. It is used to join things like paper
  6. 10. You use this for sleeping comfortably
Down
  1. 1. It is used to measure angles
  2. 2. You use it to running and protect your feets
  3. 3. This appliance is used for heating food quickly
  4. 8. We use it to write