Math Project: Equations

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Across
  1. 2. letter
  2. 4. A mathematical expression that has an equation sign
  3. 6. A branch of math that uses letters
  4. 7. number
Down
  1. 1. number with a letter
  2. 3. an addition or subtraction sign
  3. 4. A mathematical expression that doesn't include an equals sign
  4. 5. the parts of an expression separated by an addition or subtraction symbol