Math vocab word puzzle

123456789
Across
  1. 3. -1+9=
  2. 5. 0.1
  3. 7. .
  4. 8. 0.01
  5. 9. fraction
Down
  1. 1. 1/2 product multiplication
  2. 2. subtraction
  3. 4. full number
  4. 6. in total added up
  5. 7. bottom of a fraction