Vocab. extra credit

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Across
  1. 2. a number that, when added to the original number, gives the sum of 0.
  2. 3. the vertical axis on the Cartesian coordinate plane
  3. 6. an equation in which two ratios are set equal to each other.
  4. 7. changing the order or position of two numbers while adding or multiplying them does not change the end result.
  5. 8. the horizontal plane in a Cartesian coordinate system
  6. 9. a pair of numbers whose sum is zero
  7. 10. representation of a problem or concept where bars or boxes are used to represent the known and unknown quantities.
  8. 14. multiplying any number by zero is equal to zero.
  9. 17. the quantity obtained by dividing the number one by a given quantity.
  10. 18. a term that is used to compare two or more numbers
  11. 21. Tending or having the power to multiply
  12. 22. the interest you earn
  13. 23. a rate for one of something
Down
  1. 1. states that a number, known as the identity, can be added to, subtracted from, multiplied by, or divided into a number without changing the number.
  2. 2. when three or more numbers are added (or multiplied), the sum (or the product) is the same regardless of the grouping of the addends
  3. 4. a percentage of total sales as determined by the rate of commission
  4. 5. two numbers (Cartesian coordinates)
  5. 11. the difference between the selling price of a product and cost price.
  6. 12. a beginning or starting point
  7. 13. a value that doesn't change
  8. 14. a number or ratio expressed as a fraction of 100.
  9. 15. a deduction from the usual cost of something
  10. 16. the amount of money borrowed or invested, on which interest is calculated.
  11. 19. the inverse of a value or a number.
  12. 20. a real number that cannot be expressed as a ratio of integers