Carlo's math crossword

12345678910
Across
  1. 2. 100-69+1
  2. 3. 4000+1+2+3+4+5+6+7+1+2-32+1
  3. 7. 4+4
  4. 8. 100-80+2-2
  5. 9. carlo+carlo+carlo
  6. 10. square root of 9
Down
  1. 1. 100*4+100-98-2
  2. 4. resse's favorite number
  3. 5. 1+1+1+1+1+1+1+1+1-2
  4. 6. 400*0+17