Math Vocabulary

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Across
  1. 3. Changing something and putting another thing in its place
  2. 7. A symbol for an unknown number or value
  3. 8. 9*v+2x= this is an ........ ...........
  4. 10. The total in multiplication
  5. 11. Negetives and positives
  6. 12. The answer in subtraction
  7. 14. Diffrent ; black and white
  8. 15. To figure out and solve an algebraic expression
Down
  1. 1. The answer in division
  2. 2. Total in addition
  3. 4. PEMDAS
  4. 5. One pair of opposites that's sum equal zero
  5. 6. A numbers amount without its sign
  6. 9. A math sentence
  7. 13. Its sign is =