Expressions

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Across
  1. 5. a letter that represents an unknown number
  2. 7. the sum of a number and its opposite is _________
  3. 9. perform the operations), if possible
  4. 11. refers to the number of times a number(the base) is used in a multiplication
  5. 12. the result of adding two or more numbers together
  6. 13. find the value of
Down
  1. 1. the result obtained by dividing one quantity by another
  2. 2. the result of subtracting one number from another
  3. 3. the result of two or more numbers multiplied together
  4. 4. the distance a number is from zero is its _________ value
  5. 6. the product of an even number of negative factors is _________
  6. 8. 3 and -3 are ____________
  7. 10. the set of whole numbers and their opposites