Course 3 Crossword

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Across
  1. 3. what you need in order to add or subtract fractions (2 words)
  2. 5. cucumbers soaked in brine, usually sour
  3. 7. if two quantities have the same value, they are ____
  4. 10. a mathematical sentence with an equal sign
  5. 13. the first step to solving an equation with parentheses (if you don't divide first)
  6. 14. to isolate a variable on one side of an equation
  7. 16. solve x+5=y for x
  8. 18. a letter or symbol representing an unknown quantity
  9. 19. a value for a variable which makes an equation true
  10. 20. the set of whole numbers and their opposites; numbers with no decimal or fraction parts
  11. 21. Operations which undo each other are called "______ operations"
Down
  1. 1. the operation we use to undo multiplication
  2. 2. 0.7 written in words (two words)
  3. 4. the top number in a fraction
  4. 6. a mathematical sentence with greater than or less than
  5. 8. The highest level of math at Questa
  6. 9. the result of adding quantities
  7. 11. 3 and -3 are _______
  8. 12. a platonic solid with 12 faces that are all regular pentagons
  9. 15. to find a value for a variable which makes an equation true
  10. 17. fill in the blank: 8__12 (3 words)