Keywords

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Across
  1. 3. a mathematical expression consisting of two terms connected by a plus sign or minus sign
  2. 5. happens every year
  3. 7. What you do at a restaurant
Down
  1. 1. when plants live for more than two years
  2. 2. opposite of multiplication
  3. 4. a huge group of people all related
  4. 6. choosing a name for something