Math crossword

123456
Across
  1. 3. i am the opposite of subtraction
  2. 5. .you use me to double numbers without adding them multiple times
  3. 6. property. when a factor is multiplied by the sum/addition of two terms, it is essential to multiply each of the two numbers by the factor, and finally perform the addition operation.
Down
  1. 1. . you use me to get rid of a bunch of numbers from the original number
  2. 2. nine. -7+-2=?(write the answer in words not numbers please!)
  3. 4. . you use me to distribute numbers among certain things or people