Crossword clues

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Across
  1. 2. +, -, ×, ÷ and = are all ---- symbols.
  2. 3. You do this on festvals.
  3. 5. Lincoln Peirce made the book called “big ----“.
Down
  1. 1. The opposite of curved is --------.
  2. 4. This is made out of pig and it is in little strips.