Math vocabulary and math problems

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Across
  1. 3. 10 times 3
  2. 5. Valor in English
  3. 6. Fifteen divided by three
  4. 8. Square root of sixteen
  5. 9. One hundred divided by two
  6. 13. Square root of 121
  7. 14. √36 divided by √9
  8. 15. Inverso in English
Down
  1. 1. Comprar in English
  2. 2. Differencia in English
  3. 4. -√25 divided by -√5
  4. 6. 10 times 4
  5. 7. Opposite of up
  6. 10. Error in English
  7. 11. Square root of 144
  8. 12. Opposite of "decrease"